Because people are bored being stuck in T1 due to insane lag issues, whatever the reason for these lags is.

Because it is a way to play, that people actually found by pushing the game further than "normal" players did, and it worked better than the previous methods.

Because of Allagan rot, because it can become quite messy even with a good team sometimes. (don't take this argument too seriously, we wipe mostly because of lag during the laser shots)

Because they can ?

This method isn't "noob" nor "cheap". People who say that are being elitist douches that can't congratulate people doing things their own way. Who cares about how others play ? It doesn't mean they become suddely able to down twintania as easily. Let them act as they want, they did not break the game.. Or if they did, the enraged solo tank/heal Caduceus is also game breaking and the greatest tanking performance I've seen so far becomes a bannable offense. How rude

And, seriously, if you get pissed by that, get a life.