Best way to manage griefing at events

Ok, i think that one thing we are overlooking is that everyone defines grief differently perhaps?
While to some people, a person at an event who's just being disruptive might be called that, to me it's a person who's there to either spawn objects or unleash scripts that are designed to crash sims. If someone orbits you or shows outright agressiveness there's rarely any time to have the "go to Jesse" chitchat. If they are notecard spamming you might have time for a quick "hey don't do that" but by then they've annoyed half your guests.
Everyone has their own level of tolerance...i can tolerate just being ignorant of appropriate behavior and manners. Just not the heavy hitters.

To each their own. A little respect goes a long way towards discouraging someone from coming back with an alt to do more damage.

And not all disruptive people are griefers... but still need to be ejected because they're unintentionally/ignorantly griefing others. Treat them like griefers and they'll certainly become them.