I would hope a lesson might be "we negatively impacted this man and we did so without knowing all the facts, we should do better next time". I'm idealistic.
"If there's one thing to learn from all of human history, it's that we've never learned a single goddamn thing from all of human history." - Robert Evans, a podcaster (Behind the Bastards)
It's a timeless tradition that transcends time and culture. Probably not going away any time soon. At least these mobs are mostly non-violent.