Do the Dodgers have the right to exclude non-smartphone owners from participating in commerce with them? I suppose they have the legal right to, but we have a visceral reaction to it because it is morally questionable, and even smartphone owners can easily come up with examples where they'd be harmed by similar discrimination: The Dodgers also have the right to exclude non-smokers. They could say tomorrow that you can only buy a season ticket if you're a smoker, and I think that would be considered equally unacceptable to most of us.
When I run into this (most recently at a hospital), I tell them "The court doesn't allow me to have a smart phone because I'm a hazard to national security.†"
When they argue (very rarely), I tell them "Take it up with judge Kelso in the 225th District Court. He's in the phone book." That's usually enough for them to break out the backup non-smartphone plan. In my experience, there's always another way, but they're just too lazy to do it.
† Absolutely a lie, but I really don't GAF.