Tuesday, 5/04/2010 at about 10:00 PM EST, we had two folks enter the guest map and cause some trouble. I was building in *Ocean* at the time, so didn't realize it until one of them started trash talking and told me to go see what he had done. You'll have to forgive me for not taking screenshots or jotting down names, I actually forgot this server had a separate forum to address these issues until now.
One character, SuregeonShadow, SturgeonShadow (? Heh, don't remember) released active lava on the ground floor. He's not a builder, so not sure how he managed. Either he was simply opening a path to active lava that was placed by someone else, or he somehow managed to place it himself. He also constructed a large swastika (surprise surprise), which I deleted. He logged off shortly after I showed up.
The other character, lolablock, had some sort of hacked client that allowed him to teleport here and there, and use the cuboid feature. He had filled half the map with a solid block of glass by the time I showed, so I kicked him.
Did not have the means to fix things quickly as an Adv Builder, so I just let them know that I didn't care if the guest server was griefed, and went on my way.