Okay, what the hell just happened here? There's not a single post flagged by the community, and yet the thread locked. Was this really just one person deciding to spam flags across the whole thread? If that's enough to lock threads, that sounds like a bug in Discourse that lets a single disgruntled user hold a thread hostage.
As far as objectionable threads go, this one wouldn't even make my top 20 list. I don't think it warrants being closed, and certainly there's nothing in here worth banning folks over.