The "an account" link (displayed with with "add comment") returns a 404
105184
Link to "an account" in "add comment" is dead
121819
Show warning or 404 when following permalink to deleted answer
19821
Navigating to the edit mode of a not-exist page produces a strange error message
116998
404 Not Found Errors -> Redirect
26263
Need to redirect the non-existence URL's to 404 page instead of parent url
106624
Linking to a external Url - currently unsuccessful
41135
Add a link to the profile in the left sidebar
36780
How to redirect to a 404 in Rails?
9219
Add [privileges] to magic comment links
2940
How to add http:// if it doesn't exist in the URL
54805
Link to code of conduct broken?
1263
How can one link / merge / combine / associate two accounts / users? (Anonymous / unregistered / cookie, or Google / Facebook / registered)
8310
'Possible duplicate' comment not appearing for questions with deleted comments containing the link
78657
Is there a generic link to your site profile that doesn't require your user ID?
51844
Comments aren't updated after account removal
12264
Users without commenting privilege can't select the "it doesn't belong here" flag reason; a "404" error box appears when they try
51513
More 404s with missing slashes