I think there's a lot to be said for people being trolled to band together, search for prior art, file reexamination requests, etc., but I'm not sure that you can just find a lot of other people to file declaratory judgement actions with you. At least, not very easily.
IANAL, so if you're going this route, you might want to ask a lawyer to explain MedImmune, Inc. v. Genentech, Inc., 549 U.S. 118 (2007) to you. Patently-O has a nice write-up on that, incidentally, which you can read here: http://www.patentlyo.com/patent/2008/05/the-multi-fac-1.html
Basically, you have to have taken meaningful steps to do something that might be infringing. Also, the whole idea of it being a strategy works against you. The statute is permissive, so the court has discretion in terms of whether or not to hear your case. If they think you're doing it to bankrupt your opponent, well, let's just say that they probably won't look upon that favorably. Just because the law gets used as a cudgel doesn't mean that judges approve of this. It's just that some lawyers know how to make fairness really expensive.
I honestly think that the best course of action is to work together to invalidate the patents. Even if you really do bankrupt the troll, they'll probably just sell those patents to someone else, possibly even another troll, during bankruptcy.