I guess the only thing I could suggest for you is to keep in mind which players do what and keep in the back of your head that it could happen again. Just watch who you extend your invite to. Don't forget some players may not have even known about this "gathering" and were just roaming the war zone looking for enemies to kill.
I mean it is unfortunate that some players will do such low things and annoy other players in game....and I guess their reason would be "It's a game and if I can do it, why wouldn't I?/It's not a big deal..." It is difficult to deal with such players and the only thing I could recommend is to ignore them and move on. Complaining/ranting about it probably won't do much.
Anyways just a word of caution, I'd advise against creating topics like this for fear of others misunderstanding the concept of this said topic. It pretty much takes one player to take something the wrong way and suddenly they say something misleading and another person misreads that and suddenly this topic becomes a war zone for flaming other people >.<
Other than that just try to enjoy yourself in game. We're here to play the game, not have the game play you...
Alright?
