I haven't heard of anything in Florida's laws that says they are illegal. Radar detectors are not, so why would Laser jammers be illegal?!
I know they've wanted to outlaw them for sometime but that noise is quiet right now. I've heard that Laser jammers do work and that's why the hub-bub but it depends how much you want to spend on a good one. Radar jammers however do not work. You are going to get screwed one way or the other so why not just obey the law. It's cheaper!!!!!