-the top of your head, you wouldn't be happy if someone said you didn't put any effort into it and that they don't care about your feelings. Everyone has feelings, and I would suggest treating people they way you want to be treated.
Prugnets, how would you feel if you had drawn something for the public, only to be bullied. Drawing is something for everybody, and they all have their own specific art style. There is no reason to be rude to others, just because they drew something from