Out of curiosity, do you post on the forums every time you get smacked by opposing faction ?
I play on Outland EU Alliance side, it happens all the time while I level my shammies, I live with it (it's my problem that I chose PvP server). Mostly it's done by lvl70 hordes who do it out of boredom or something... or it's just their little payback for the pwnage they get from a few multiboxers on Outland. Don't care really why they do it, they are a nuisance and I deal with it by going afk for a while if they choose to camp I don't give them the satisfaction of doing it over and over again.
People are different, some are into PvP and can't resist a kill in sight, some can.

This is coming from a carebear who never initiates a fight, I'm just not into world PvP.

PS. never understood the reason for posting on the forums regarding ganking