Thanks for the input.
We seem to have a batch of good tenants, then some bad, then good again, and I'm always looking for ways to weed out the bad. In our low income area if we tighten down the criteria too much we don't get applicants. But I think their understanding of peaceful enjoyment for the neighbors are culturally different from mine. Or, putting upholstered furniture outdoors and suddenly the place looks like a dump.
We have complaints from the city on mowing and trash piling up for one (which ended the debate with hubby on when to intervene, lol) and neighbor complaints for the other. We ask the neighbors to phone us at 2am when they are being obnoxious, but they don't, and I think it is overblown, but the neighbors hate them and that's not fun for anyone.
Lawyers here say we cannot ask about smoking and can only ban smoking from the interior, not the entire property. I need to poke at that some more. I think all of our tenants are smokers, though, so guessing we have to live with it regardless. We don't ask, but they volunteer, and we see them smoking on the porch when we drive by.