The ONLY thing I'd say is risky about AOB'ing are easily mistakeable impossible scores and times (I suppose this one applies to SSing as well).
I know there's a code for destruct-o-match that makes any score a 2,500, i.e. the avatar score (I could be wrong about the number; too lazy to look...), but if you play the double game thingy, it doubles your score, so instead of 2,500 you get 5,000, which is an automatic freeze.
A similar issue is knowing when to stop. If it's a particularly boring game and you just power sleep through it, you might miss the magic window if when TNT gives a flying crap and BAM - frozen.
Finally, there's the AC thing of if you AOB, the scores might look okay to TNT when they just look at the single scores sent, but a single player having a million billion goals, while the others have 0-10 and the goalie has 0 catches is a dead giveaway to other players and a one way trip to Iceland, which really cuts down my time watching the Simpsons back to back...
Anyway, those are just my gripes