My issue of abuse of game mechanics is pretty specific, so I'll avoid names and generalize as much as I can. But when you have a character who goes directly against faith teachings (as a faith character) then does a bunch of stuff the deity likes to claim it's okay is a total abuse of game mechanics. It absolutely drives me insane.
For the most part, I try to personally follow the too good to be true idea. Oh, and I bug Alla alot when I have questions.