The number of noobs khmm... misinformated people who cant clearly see what happens in this thread is ridiculous. Stats scaling is bad, yes, but it has nothing with the insane prot pala damage exploit.
Even with those stats noone of other classes (except prot palas) can have THAT high damage and immortality. When you bug vengeance to millions you just use sacred shield and let the boss/trash dps you - you wont take any damage, even magic, also the healing seal heals you always, that is scaled good with venegance, so, basically, 80 prot palas can take ANY damage and solo ANYTHING in game if they will take proper damage ( manage cd's and pull more and more trash/ eat more damage- low at start to not be 1shotted, increasing to maximum in like 30 sec) - after that the pala is just invincible.
PS: a good example of "clever use of game mechanics" without exploiting is in my signature- my ICC25hc solo as an 80 DK. Or that : http://www.youtube.com/watch?v=T_1tvvy2eI0 , with 124% avoidance.