I love it, I'm glad its an offense that may result in a ban.
You guys miss the point, it's not because you gain some unfair NP its because some players:
1) Accidentally click CZ on TP gate while they have 10 gb's on them.
2) Spawn in CZ and instantly die, therefore have to sit and wait for the mages to leave so they can actually start PKing.
3) Get frustrated with CZ and quit (less money for K2).
etc. etc. etc.
There are more engatives to this than positives, the towers are there for a reason. Just because someone found a way to tank them doesn't mean the DEVs are cool with it.