What do you think about me posting something petty in an anonymous class discussion board?
What made you post something petty?
Because I was mad at the class discussions, so I decided to post what I really felt to everyone.
While it can be tempting to say things you normally wouldn't in an anonymous forum, it would be better to hold you silence. Someone's feelings might get hurt, or someone might find out who you really are and be angry with you for what you've said.
There was no harm done, and no one has the right to tell me what to do.
If you post something petty or rude in an anonymous forum, it's because you are aware that you should not say such a thing. It would be best to avoid saying things that can bring mental or emotional conflict to others.