If you're burger's bun is soggy or your fries under-salted. Don't threaten to sue. We'll only make fun of you after you leave. Milk shakes have milk. Peanut butter pies have peanuts.
Salads have tomatoes.
Use common sense and don't tell me about your allergy after you've eatten half of it. However, it will make me take my own sweet time getting the correct food or drink. No we do not take credit cards. No we will not cash your paycheck. No you may not use our phone.