Of course the bad part is that the smart hacker doesn't get caught.
He makes his plane turn just a tad better, dive just a tad faster, armour just a tad stronger, ammo just a tad deadlyer.. Enough to give him the edge needed to make 10 kill sorties easy - yet die if shot good enough.
That way you can always blame the net.
I could name a couple of players like that whom I suspect of doing this.. but obviously I can't prove anything.
I don't even know if the above is possible in AH, but in some cases it feels that way.