I say leave it stickied. Sherdog isn't responsible for harassing anyone. People are making that decision on their own. I have read every page on this thread and cannot remember anyone seriously proposing to attack their myspace page. I'm sure most of that is being done by people from other boards. The biggest sentiment here is to not personally attack them and just keep it on the boards.
What is happening will keep happening regardless of whether or not this thread is stickied. You might as well keep the thread easy to find. Besides, a direct link to this thread has already been plastered on every corner of the internet. Removing the sticky won't make it any less difficult to find.
I'm on the fence in general. I believe that personally attacking these people is wrong however, I do believe in free speech. With that, if someone wants to make a thread about how much I suck, go ahead. If I put myself out there like that then, I should ready myself for anything and everything.