There needs to be somebody who calls out inappropriate behavior, and bans people who abuse services.
We should all call out inappropriate behavior. My concern about "people who abuse services" is that it takes very little for people to be seen as abusing services, such as not asking a question the right way. I'd far rather we simply ignore the people who we don't care to help, rather than create a fight.
Calling names isn't implicitly part of the role, and should be avoided.
Calling names must
be avoided. There is simply no case where insulting or degrading someone is the best response.