Re: "these guys sound bitter"
Wouldn't you be bitter if you felt you'd been unfairly fired?
Not so bitter as I'd destroy my whole career by going public like this, no. What I'd probably do is pick myself up, dust myself down, and find a better employer, then move on with my life.
Their reputations are toast now, no matter who wins any legal dances that may emerge down the line. They've no chance of being hired by a proper company in future - you'd never be able to explain to HR why you hired them given their previous cyber bullying of colleagues, were there to be a repeat in your gaff.