Have you ever had a really good thread going for awhile, everything is fine and there are many insightful and wonderful conversations going on when all of a sudden some jack ass wonders in and starts some that gets the thread closed...

It just happened to me today and I'm pretty angry. So to alleviate my anger I felt like starting a thread to see if this has happened to anyone else. Let your anger out but don't mention any names or post any links. We need to be civil and keep the peace