You are sealioning with all of these questions and accusations. This isn't a trial, aroundtown doesn't need to divulge all of the evidence in order to share their anecdote here. You've made an unfair judgement without knowing them or their boss.
My point is clear, we are only reading one side of the story and I don't see an iota of maturity in the story he described. Therefore I also don't believe that his manager called everyone in the town to tell them not to hire him. We don't even know the feedback was sent out to his manager.
Maybe the other employers figured out on their own or maybe they asked his manager for a reference.
They don't have to share anything at all, but I'm free to talk about the parts I've read.
Even if all my judgment is correct, that doesn't mean anything. We all did hot-headed stuff, fucked around and found out.