My account was hacked on October 27th and it spammed a number of my groups. As a result of this I was reported to Linden Labs, ejected from some of my groups, and found myself locked out of my account. I am still awaiting word from Linden Labs to see if I can get my account back. I don't know who was behind this, but this kind of thing compromises what is supposed to be a fun activity for everyone.