Of course you can control it. In many locations it is effectively controlled where only those wanting to have poop thrown in their face will and the rest can go on without it since the vast majority of zones are poop-throwing-free (in the places I am referencing).

In the town I live in, smoking is only allowed in adult-only establishments. And those allowing smoking are the minority because many business owners realized their customers don't want it at all. Best of all worlds and the state didn't have to completely outlaw its public indoor use, just restrict it.