7 Ways Waiters Can Get Revenge If you've ever worked for gratuities, you have more than likely felt the compulsion to seek revenge against nasty customers and bad tippers. Sometimes, waiters cross the line and can turn into the "waiter from hell" in order to stay sane, as wait staff veterans -- including Steve Dublanica, author of "Waiter Rant" -- revealed to "20/20." Watch the full story on the full episode of "20/20: True Confessions" So be wary when you next go out for a meal, and be nice to your waiter, or you could end up with a whole lot more than a plate of burger and fries, as the following examples show. Getting the Cheap Seats Has a customer driven you crazy before he or she has even sat down? Try seating him or her at the worst possible table -- next to the bathroom -- as some waiters have been known to do, Dublanica said. Rejecting Credit Cards I'm sorry, sir, but your credit card does not seem to work. When the credit card is valid but the customer's attitude is villainous, a vengeful waiter might lie and tell the customer that his or her card is, in fact, not working, Dublanica said. Goodbye plastic, hello embarrassment. Passive Aggressive Tactic: Passing Gas Some waiters even stoop as low as to fart past customers while serving others, Dublanica said. The beauty of this below-the-belt technique is that no one will know for sure who actually let it rip. Perfecting the Art of Hitting Customers on the Head With a Tray One waiter has it down to a fine art: Every time he passes a rude customer, he will clip him on the head with the edge of his tray. And then, of course, he'll smile sweetly with an "oops" and an over-the-top apology. This has to happen several times to get the optimum affect. Delaying the Order A common tactic to ruin your dining experience is to make you wait and sweat it out, Dublanica said. After a waiter has done that, for the ultimate revenge you'll get the wrong order.