I got a pop up in my land that read "GOONDSQUAD ARMY RAPING YOUR SIM N&^*"
My neighboring sims told me they received the pop up also. Apparently one of my neighbor sims has allowed object entry into his land so a griefer was allowed to rez his griefing items which have taken over his sim completely (sim name Green Goblin). The only thing we will get is a pop up message. Just report it with a snap shot and block it. I have heard this is the new thing now.
If you can to protect yoursel block object entry into your land and assign specific roles to the people you allow to rez objects. Or even allow the land itself to clean up after an hour or so.