Changed our minds: Let's track internal links, just never to users. Something like FAQ is useful.

spec/models/topic_link_spec.rb

@@ -143,7 +143,7 @@ describe TopicLink do
 
     end
 
-    context "link to a non-topic on discourse" do
+    context "link to a user on discourse" do
       let(:post) { @topic.posts.create(user: @user, raw: "<a href='/users/#{@user.username_lower}'>user</a>") }
       before do
         TopicLink.extract_from(post)
@@ -154,6 +154,17 @@ describe TopicLink do
       end
     end
 
+    context "link to a discourse resource like a FAQ" do
+      let(:post) { @topic.posts.create(user: @user, raw: "<a href='/faq'>faq link here</a>") }
+      before do
+        TopicLink.extract_from(post)
+      end
+
+      it 'does not extract a link' do 
+        @topic.topic_links.should be_present
+      end
+    end
+
     context "@mention links" do
       let(:post) { @topic.posts.create(user: @user, raw: "Hey @#{@user.username_lower}") }