Just keep small claims like that in small claims court. Then auto-Ronald has to send $500/hr general counsel instead of farming it out to a law firm and that makes it impractical for them to sue little people.
2. McDonalds could make it so to get inside you have to agree to arbitration of any disputes. That's usually just used by companies to make you use arbitration instead of the courts when you have a complaint, but offhand I can't think of any reason they couldn't require arbitration in the other direction.