My analogy falls down a little there. In the dude-in-the-street situation I wouldn't begrudge the fellow striking me down after a short while. I don't think he'd be fully justified, but I'd consider it fair enough. In a game, there's really no excuse. If someone is annoying you by griefing, leave the server rather than getting furious. If someone is inconveniencing you in a game, the option always exists to just not be inconvenienced. Sure, it would bug me to be driven from a server by a griefer, but there's no reason to stay if I'm not having fun. Whether I stay and don't enjoy it or leave the server, the griefer gets what he wants, so there's no reason to try and be bloody-minded about it.
It sounds like what you're describing isn't really what I'm thinking of, though. What you seem to enjoy is when other people are also having a laugh. If everyone's enjoying it or finding it funny, I wouldn't call it griefing. It would better be described as unconventional play, which I guess is what I meant with what I said in my earlier post about Mario Kart.