Oh I'm not trying to make anyone out to be dangerous, I can only speak to the experiences of one of the guys I help take care of. He can be violent but 99/100 times, it's directed at himself and even that is pretty rare. By and large, they're fine if a little weird and annoying like you said.

I work in assisted living in small home settings, one of our guys is psychotic and is absolutely loud and weird, much more of a danger to himself than others. He's generally fine, I think he's only gone there once in the 3ish years I've been with the company. Thankfully his sister takes him for holidays, and she got him early this year because of the storm, so it's been blissfully quiet in the house.