I’ll treat them politely, just like everyone else. I will not bend over and suck their cocks just because there’s a small chance one of them might be a thug. By that argument, I’d have to call everyone “sir” and treat them like a peasant treats a lord because they might be a psycho killer or mugger.
And if they ask me to suck, I’ll bite hard, even though pigskin isn’t kosher.