I'm sure it would be TOTALLY worth while suing me, I imagine my hat and ocarina collection (both rather small) would be worth....something. Perhaps my phone? Or the nice pair of shoes I've recently bought.
Mmm, better be prepared though. Sometimes these legal folks have a "shoot first and ask later" mentality. I wouldn't be surprised if they try to take down GLBSE for some initial investigation - only to decide later that the request was not justified. Then you'd have to sue them back for the damage the take down did cost you... and everyone else.