I am curious if someone can be forced to leave, or banned from, a public establishment for displaying off putting behavior, if no "laws" are broken?
Maybe a direct confrontation with authorities might lead to someone crossing that line legally? I suspect there might be no bearing on the tragic outcome here either way, and I'm certainly not trying to live in a Minority Report-ish world.
Unfortunately, I would just guess those working in a customer-facing service industry might have to put up with this type of behavior (sadly) all the time, if no laws or establishment rules are broken.
I'd be tempted to ask how often next time I'm in one, but then I might make the unofficial list