The worst drama you have seen on a forum?

Over the years of running and being part of forums, I have seen some drama, but I can't say I have seen any that I would say is the absolute worst, at least not as of yet.

What is the worst drama you have seen on a forum? Has there been more than one instance of really bad drama you have seen?

Actually, I have ran into the worst drama I have ever seen on a forum. People started calling me scammer when my co-owner didn't pay a user he hired to post on our forum. Actually, my co-owner asked the user to wait for sometime for payment but the user started posting on various forums about non-payment, and pulled me into it.