JP servers apparently lack this issue as well.

The botting in PVP was when we NA players started wondering if SE cared about our side of the game at all. It's been a pretty disheartening seeing this stuff happening. Yoshi-P only found out RMT spam was so unbelievable on NA servers when he logged into one for LL and was promptly BOMBARDED with RMT tells and shouts. It's been almost squashed now.

Botting basically makes PVP modes borderline unplayable. We've come up with a ton of solutions to get these leeching players to leave us PVP fans alone, but SE won't change anything or even acknowledge the problem.