I have wondered the same thing. There is a saying that when someone has nothing left to lose, they lose it. But I thought of a few factors.
The GB as a whole would be the real target, and you can't just walk into their meeting. IMO you'd have to take them out "Breaking Bad" style or suicide bomb them all at once. (No, I'm not crazy or issuing threats) As far as I know, the only time they are together in public is at the annual meeting, and that is invitation only. So, not so easy. Besides, people don't suicide bomb in this country, It's not our style, but sadly suicide is.(RIP oompa/Eric Reeder)
You would have to figure that even the worst ex JW wouldn't go for revenge, Pissed is a state that usually goes on to depression, then, hopefully, acceptance. Just my .02
HBH