Making a "Service Charge" that's different from your "Delivery Fee" so you can advertise low delivery costs while still slapping on an extra charge is underhanded... and I guess I'll ignore that the (understandable, admittedly) fuel surcharge isn't considered the Delivery Fee either. Plus the tip because obviously the Service Charge isn't going towards paying them more, because why would it? But you still got the food to my door.