If I ran a pizza place, I'd have the driver tip automatically built in as the "delivery fee." Tips for certain jobs, like waiter, make sense, but not really for delivery drivers, since they -have- to deliver your pizza(s), they can do more orders if they finish trips quickly, and complaining to management would resolve any problems better than stiffing a delivery driver who probably did nothing wrong. Also, the most uncomfortable places to deliver tip the least, I believe.
Agreement/disagreement on pizza delivery tips being built in?
Agreement/disagreement on pizza delivery tips being built in?