I can think of like two things and they're Both PvP zone related (Badge Hunting of course).
So similarly to what someone explained doing earlier here, there was a small group that would TP you as you zoned into a crate (they MUST have been using binds for it as it was near instant) where you would then get pummeled. First time, ok that's just for being in PvP zone, fine. 2nd time ok, this is annoying. 3rd time, we had a discussion about "can you just Please let me get the badge and go?"
2nd one was a bit more juvenile, but nearly like the above. Basically, someone who back then we ALL knew was a jerk overall decided to follow me through the whole zone and repeatedly KO me as I hunted the badges. Unlike the above where they decided to play nice, THIS person wouldn't stop and was even being a jerk otherwise. So getting tired of it I gathered a group of PinnBadges peeps from the chan and we mobbed KO'd the crap out of him (don't think he honestly cared) until he left the zone (I think).
Sure, I know the other side of it, but the badges are there, Everyone knows about it, but some people just have to be jerks about it.