Maybe.

Are the drivers employees, or self employed? Are they going to have security people riding the routes, or rely on the drivers to provide that service?

I have in mind local retailers, who pretty much ignore shoplifters because it costs more to pay for injuries to their employees who try to stop the shoplifting. So they let the shoplifters go.

I've seen city bus drivers physically toss out disruptive passengers.

That's good. Unfortunately, those disruptive passengers can get on the next bus. With an Uber-like service, anti-social passengers can be banned (temporarily or permanently).