I guess you could still joke around and play harmless trolls, not spread nonsense or cause offense. You receive a handbook of all the rules and why you should remove things so understandably, you'd have to follow those rules. And no, it's not snitching.
Nonsense is one of the reasons to have a post removed so I would assume if you are breaking posting rules that you aren't going to be selected to be a mod. I would suggest looking at the help section of GaG to see how to become a mod.