I've had numerous encounters with level 60 campers who decide that pulling every mob in the area, all at once, is a good tactic to maximise drops -- indeed it is, but when there are other players there waiting to complete a quest, it's not a particularly nice tactic. Of course, on PvP servers you can add ganking into the equation, making it often more fun for the would-be quester to give up rather than waste several hours on one quest.
Have you had bad camping experiences? Any tips to deal with those who just refuse to budge? Or are you a camper, and willing to defend your stance?
Asking politely is one way to deal with campers, but it only gets you so far -- nowhere, when it comes to the opposite faction. Irritating them so that they'll give up is another tactic that I've seen employed, but can't bring myself to try. Ultimately, there isn't much you can do to stop people camping, especially when they ignore you -- but don't dismiss them all as gold farmers without a second glance. Some may be questers just like you.