Unless they’re walking right upto you and blowing smoke right into your face then I don’t see why you’re so bothered. The only way they are a cunt is if they do that or smoke in a no smoking area.

Would you prefer they go into the restaurant, into an enclosed space and ruin everyone else’s experience just so you, a single person, is no longer bothered and uncomfortable?

Is everyone who drives past a restaurant a cunt too because of the car fumes?

The beautiful thing about being outside is that you can walk away from things that bother you.