on my server there are some pvp guilds that when you see their name, you're like oh bleep... I'll have to work for it, or sometimes, I've been questing and all the sudden a sith is leaping at me, then he stopped and said oh.. I'm sorry you're pax, have a nice day.
There have been some times when our lowbies are out questing, and somebody would complain about being ganked somewhere, so we'd show up in force and control the area for a bit, before we got bored and decided to own some world bosses.