Asking genuine doubts is a fault on Codeforces?? Or they become a source of mockery.

This guy NeverCompromise literally mocked on this blog .

If you do not want to answer such doubts, please don't just ignore, what sense does it makes by mocking other?? These kind of people should be banned I firmly believe. This is a Codeforces Community to learn and grow I presume, not source of entertainment when someone is seriously asking something.