There is a determined griefer (using multiple accounts) taking advantage of parcels that allow anyone to rez objects or to move rezzed objects through. Favorite devices seem to be giant transparent cubes with the name 666 and poofers. Please, for the love of all that's holy, please disable this option on your parcels. Please also sweep your parcels regularly for anything that doesn't belong and return immediately. There are only two admins who can return (not counting Nadir) and they're both (understandably) busy. If parcel owners can take responsibility, that will help.