Not exactly IN RO, but it can still be related,happened in Perfect World:
~Before taking out a really strong mob
Me: Hmm...so who's going to tank it?
Girl: Tank? Are we in a war?
~Needless to say, it was a failed attempt
~While helping my 2x friend (I was around 5x at the time) kill a strong mob
Some 2x dude: Noob!
Me: Umm...what?
Some 2x dude: My friend was gonna help me kill it!
Friend: This was mine
Some 3x dude: I'm gonna report u
Me: =_= *Walks away*
Even though, that dude was in PK mode so I could just enter PK and start murdering him...