well, more work would be needed in terms of watching people armatars if they can upload their own, but people on this site won't post inappropriate images if they are aware of harsh penalties.
OH NO!!! there r very ignorant people out there even on this site. Ive been around long enough to see them. And of course the worse penalty is getting banned. It wont change ur life in any way so some people think it will be fun to mess up the site