They were clearly told they wont be returned with their families unless they sign an statement so they won't sue. In the grilling, BP CEO was asked if this is a proper way to treat employees. http://www.abovetopsecret.com/forum/thread570365/pg1
Wow! BP kept survivors hostage? Not allowing them to speak to their families or leave the ship until they signed? This is criminal ( not just a civil offense). The attorneys may be liable too! They should know better.
There's opportunity for all kinds of torts here. The problem is its too much of a good thing for lawyers. The proceedings will take forever and if they succeed the judgments may very well never be recovered due to bankruptcy. BP has near infinite liability (>1 Trillion) under federal oil spill law. Suing their attorneys is a good idea though.