Create a blacklist to keep from seeing certain users
20354
Add the ability to ignore users
45016
Allow registered users to hide username when asking privacy-sensitive question
90954
Way for members to block specific community members from commenting/answering posts?
106627
block certain dangerous commands?
115587
How do you make hacking useful without excluding other players?
117525
Block Particular Command in Linux for Specific user
147728
Follow activity of certain users
39422
Can we set privacy for "last seen" status?
44432
Allow anyone to comment but hide low-rep users' comments until reviewed
122435
Permission Settings: Anonymous Users
88207
Automatically protect questions with three or more low-rep-user deleted answers
56949
Want to prevent a user to access other user cases
43548
Starred message from ignored users should not show up
54466
Staying anonymous with connected accounts
90446
Is there a way to HIDE a file/dir from a specific user/group?
23683
Flagging mechanism for offensive usernames
64972
Do not display the posting time/user card in review; it makes audits easily detectable