Spitting in the Customer's Food

If you're an Unsatisfiable Customer or otherwise not Nice to the Waiter, this is how he may get back at you. It's not just limited to spit, either... as Real Life incidents have testified to over the years, an especially vindictive server may adulterate a customer's food with other bodily secretions -- or worse, any inedible or possibly poisonous substances he may find handy. And sometimes it happens not to get back at a particular customer, but at any or all customers, For the Lulz or even For the Evulz.

Finding out this has happened may prompt an I Ate What? response from the diner in question.

While Real Life incidents are not explicitly excluded from this trope, please keep in mind the Rule of Cautious Editing Judgment, because some cases start at Squick and get much, much worse. Also, do not list examples of food adulteration born only of greed or depraved indifference -- this trope is explicitly about contaminating served food as a kind of revenge, either on an individual or a group.

Fan Works
""Strong words from the girl who relied on the tea I brought her to stay awake long enough for Astronomy class." "You mean the tea that enslaved elves made for you?" "Hey, Dobby was a free elf. All the other elves would spit in drinks if they knew it was for you.""
 * In chapter 7 of the Crossover fic Harry Potter and the Vegas Mishaps by "alienyouthct", there is this exchange between Harry and Hermione:


 * In the Harry Potter Alternate Universe fic Hermione Granger and the Boy Who Lived (part of The Teraverse), Hermione spends some time working undercover as a servant in the UK's Spy School Harworts (sic), where she learns that the kitchen staff routinely spits in the food that Drake Malenfant sends back "to be prepared properly".

Live-Action TV

 * Referenced in an episode of 3rd Rock from the Sun. Disguised alien Dick initially doesn't tip waiters because he doesn't know he's supposed to. When he's told about the practice, he declares, "No wonder my coffee always tastes like spit!"

Music

 * Bob Rivers parody "Minimum Wage" begins with a client asking for a Spiffy Burger, "...and curly fries, but only if they're cooked in virgin peanut oil..." in an upper-class, sophisticated aristocratic British accent. It ends with the minimum-wage worker spitting in his food and telling the client to "enjoy your burger!"