diff --git a/pkg/controller/account/settings.go b/pkg/controller/account/settings.go
index da882a3..da20479 100644
--- a/pkg/controller/account/settings.go
+++ b/pkg/controller/account/settings.go
@@ -17,6 +17,7 @@ import (
 	"code.nonshy.com/nonshy/website/pkg/models"
 	"code.nonshy.com/nonshy/website/pkg/redis"
 	"code.nonshy.com/nonshy/website/pkg/session"
+	"code.nonshy.com/nonshy/website/pkg/spam"
 	"code.nonshy.com/nonshy/website/pkg/templates"
 	"code.nonshy.com/nonshy/website/pkg/utility"
 	"code.nonshy.com/nonshy/website/pkg/worker"
@@ -114,7 +115,15 @@ func Settings() http.HandlerFunc {
 
 				// Set profile attributes.
 				for _, attr := range config.ProfileFields {
-					user.SetProfileField(attr, r.PostFormValue(attr))
+					var value = strings.TrimSpace(r.PostFormValue(attr))
+
+					// Look for spammy links to restricted video sites or things.
+					if err := spam.DetectSpamMessage(value); err != nil {
+						session.FlashError(w, r, "On field '%s': %s", attr, err.Error())
+						continue
+					}
+
+					user.SetProfileField(attr, value)
 				}
 
 				// "Looking For" checkbox list.
diff --git a/pkg/controller/forum/new_post.go b/pkg/controller/forum/new_post.go
index a42c42f..9eab5d1 100644
--- a/pkg/controller/forum/new_post.go
+++ b/pkg/controller/forum/new_post.go
@@ -15,6 +15,7 @@ import (
 	"code.nonshy.com/nonshy/website/pkg/models"
 	"code.nonshy.com/nonshy/website/pkg/photo"
 	"code.nonshy.com/nonshy/website/pkg/session"
+	"code.nonshy.com/nonshy/website/pkg/spam"
 	"code.nonshy.com/nonshy/website/pkg/templates"
 )
 
@@ -183,6 +184,19 @@ func NewPost() http.HandlerFunc {
 
 		// Submitting the form.
 		if r.Method == http.MethodPost {
+			// Look for spammy links to video sites or things.
+			if err := spam.DetectSpamMessage(title + message); err != nil {
+				session.FlashError(w, r, err.Error())
+				if thread != nil {
+					templates.Redirect(w, fmt.Sprintf("/forum/thread/%d", thread.ID))
+				} else if forum != nil {
+					templates.Redirect(w, fmt.Sprintf("/f/%s", forum.Fragment))
+				} else {
+					templates.Redirect(w, "/forum")
+				}
+				return
+			}
+
 			// Polls: parse form parameters into a neat list of answers.
 			pollExpires, _ = strconv.Atoi(r.FormValue("poll_expires"))
 			var distinctPollChoices = map[string]interface{}{}
diff --git a/pkg/spam/spam.go b/pkg/spam/spam.go
new file mode 100644
index 0000000..3ac48a2
--- /dev/null
+++ b/pkg/spam/spam.go
@@ -0,0 +1,32 @@
+package spam
+
+import (
+	"errors"
+	"strings"
+)
+
+// SpamWebsites to third-party video hosting apps: we already have our own chat room, and third-party links shared in
+// public places can pose a risk to user privacy/safety.
+var SpamWebsites = []string{
+	"join.skype.com",
+	"zoom.us",
+	"whereby.com",
+	"meet.jit.si",
+	"https://t.me",
+}
+
+// DetectSpamMessage searches a message (such as a comment, forum post, etc.) for spammy contents such as Skype invite links
+// and returns an error if found.
+func DetectSpamMessage(message string) error {
+	for _, link := range SpamWebsites {
+		if strings.Contains(message, link) {
+			return errors.New(
+				"Your message could not be posted because it contains a link to a third-party video chat website. " +
+					"In the interest of protecting our community, we do not allow linking to third-party video conferencing apps where user " +
+					"privacy and security may not hold up to our standards, or where the content may run against our terms of service.",
+			)
+		}
+	}
+
+	return nil
+}
diff --git a/web/templates/account/dashboard.html b/web/templates/account/dashboard.html
index 603f32f..7d10f0e 100644
--- a/web/templates/account/dashboard.html
+++ b/web/templates/account/dashboard.html
@@ -648,6 +648,7 @@
                                                 <!-- GIF video? -->
                                                 {{if HasSuffix $Body.Photo.Filename ".mp4"}}
                                                 <video loop controls controlsList="nodownload"
+                                                    {{if $Body.Photo.AltText}}title="{{$Body.Photo.AltText}}"{{end}}
                                                     {{if BlurExplicit $Body.Photo}}class="blurred-explicit"
                                                     {{else if (not (eq ($Root.CurrentUser.GetProfileField "autoplay_gif") "false"))}}autoplay
                                                     {{end}}>
@@ -660,7 +661,9 @@
                                                 </div>
                                                 {{else}}
                                                 <a href="/photo/view?id={{$Body.Photo.ID}}">
-                                                    <img src="{{PhotoURL $Body.Photo.Filename}}" loading="lazy"{{if BlurExplicit $Body.Photo}} class="blurred-explicit"{{end}}>
+                                                    <img src="{{PhotoURL $Body.Photo.Filename}}" loading="lazy"
+                                                        {{if BlurExplicit $Body.Photo}} class="blurred-explicit"{{end}}
+                                                        {{if $Body.Photo.AltText}}title="{{$Body.Photo.AltText}}" alt="{{$Body.Photo.AltText}}"{{end}}>
                                                 </a>
                                                 {{end}}
 
diff --git a/web/templates/photo/permalink.html b/web/templates/photo/permalink.html
index 51f8f48..be41a55 100644
--- a/web/templates/photo/permalink.html
+++ b/web/templates/photo/permalink.html
@@ -72,13 +72,16 @@
                 <!-- GIF video? -->
                 {{if HasSuffix .Photo.Filename ".mp4"}}
                 <video loop controls controlsList="nodownload"
+                    {{if .Photo.AltText}}title="{{.Photo.AltText}}"{{end}}
                     {{if BlurExplicit .Photo}}class="blurred-explicit"
                     {{else if (not (eq ($Root.CurrentUser.GetProfileField "autoplay_gif") "false"))}}autoplay
                     {{end}}>
                     <source src="{{PhotoURL .Photo.Filename}}" type="video/mp4">
                 </video>
                 {{else}}
-                <img src="{{PhotoURL .Photo.Filename}}"{{if BlurExplicit .Photo}} class="blurred-explicit"{{end}}>
+                <img src="{{PhotoURL .Photo.Filename}}"
+                    {{if BlurExplicit .Photo}} class="blurred-explicit"{{end}}
+                    {{if .Photo.AltText}}alt="{{.Photo.AltText}}" title="{{.Photo.AltText}}"{{end}}>
                 {{end}}
             </div>