Ohio

Tire smoke is generally not good to be breathing in. Better idea would be tarps.

I dunno about the smoke. On top of probably seeming to be an escalation because you'd be burning stuff (I'd probably go with fog oil and a generator instead, only object is price, but, hey, tires can also get pretty expensive depending on where they're sourced. Theater department might also have some stuff on em), but also a large amount of smoke might serve to obfuscate documentation and recording, which I would say is a pretty big priority. Keep a camera fixed on these snipers at all times, and you can tell when they're firing and probably who's been killed at what moment, and that's maybe an important and large deterrent, compared to a smokescreen. I'd imagine if you were going with that and if it came to that, you'd just want to render the snipers ineffectual by other methods, which, you know, maybe your mind can wander about how you might accomplish that one, without me having to suggest a specific course of action there.