From what I remember from those forum posts, the mage loads an instance and proceeds to pull EVERY mob in the zone. After more than 100 mobs are on the move chasing him, the server begins to have problems accounting for placement of every mob, and the server seizes up. Mobs stand in place, unable to move while the server tries to calculate their pathing and behavior. At this point the mage places himself properly and uses beam spells to mow down stationary, harmless mobs.
Is this cheating? There was a huge debate on SOE forums about this. The mages of course say, "well rangers and SKs and zerkers all swarm so we should be able to too!" And so on and so forth.
What's fun about going from 0 to 8000 AA in two weeks though? Okay, so now you're max AA and max level, go raid five hours a week. I guess if your priority is being top dog and that's how you enjoy the game, that's fine. Myself, I prefer enjoying the game at a slower pace and exploring and helping friends and such. Bragging rights in my books are my illusion mask collection, not my AA count. EQ has always been about the adventure and journey that your character takes, not about buying Kronos with dollars, trading it for plat, and buying powerlevel sessions with that plat.