I facing headache problem when I chit chatting with other players and I already type many things. Then last sentence. “What class u using?” when press enter. the whole sentence will turn out " ** "…At that time, I was just stunning like …–> 0_0!!!..soundless. Other players will thought I typing some bad words. T_T
because cl"ass" 
The chat filter’s horrible (just like RO’s was, hm i wonder why). It’s incredibly easy for someone with ill intent to circumvent it by simply saying @ss or a.ss , etc. So all this really does is making chit chatting a incredible pain in the >ASS< for people who aren’t trying to curse at anyone.
They should just put an option for filter. Where we can just turn it on or off…
I agree, an optional filter would be nice, I really don’t think most of the demographic for this game is going to be upset about “ass” being said, and it’s pretty annoying when you’re trying to use words like “class” or “assassin” only to have part of it filtered.