Block user who refreshes web too often
36549
How can I implement rate limiting with Apache? (requests per second)
30644
How restrict page for users logged?
140902
How can I limit the usage time for an user profile in Windows?
67987
Get rid of the question ban on Meta; suspend actively harmful users manually
34245
Handling harassing users?
24190
Block specific URL on web browsers
138856
Any way to support users who block Google APIs?
127718
Methods to ban bots, force attacks on my server
65484
Lock other users from using my workstation
143868
How to restrict a user from accessing a particular application?
22176
Keep short history of user display names
100205
Make it possible to prevent voting on time-limited questions in meta without a historical lock
72143
Prevent long running javascript from locking up browser
566
How to block specific websites without using Parental Controls?
135615
How can I make Chrome stop caching redirects?
44836
How to permanently turn off online results
125941
Prevent users from starting multiple accounts?