Is it safe to show user IDs in the profile URL?
31395
Exposing database IDs - security risk?
119457
Would it be better to encourage people to set a user name?
128678
Is it possible to get the User Id without the authorization?
20808
Choose information when copying profile
141588
How to get an anonymous user session id?
100882
Is it OK for me to track visits to my Stack Exchange profile, questions, & answers?
48351
.htaccess - Pretty User Profile URLs
140834
The Stack Exchange Network Profile/Accounts links should be made optional
129562
User with only per-site meta profile
112588
Is it possible to make a second "edit account" page that only allows users to edit some profile fields?
44312
Please display additional user information on the Android app user profile
103750
Where are the pristine, untouched contents of a ~/.profile file?
99742
Allow moderators to see delete/undelete activity on users' profiles
31896
What approach for showing custom user fields on a node?
145503
"Ban myself" button in user profiles
86885
Why do some users have username "user########"?
68444
Is there a way to hide my profile from Google search?