I haven't followed all the technical details but there was some pretty strong words about how the anti-fork brigade had a plan to attack the forked blockchain and it *seemed* reasonably scary what they were saying. Maybe it was overblown? Maybe some of those folks have come around now?
Why would this be scary? They've openly said that they would do it, right? You know their names, right?
Then sue them for whatever you want. They do realize that when publicly exposed they are at risk, one could easily come up to their place and *insert action*.
Anyhow I wouldn't be worried. First they've tried to win by using bad arguments, this failed so they've gotten a bit more offensive.