Ridiculous Orders
Do people even realize how sweet Starbucks syrups are? Maybe they don’t, which is why they order a crazy amount of syrup in their tall drinks. For the most part, people won’t order an inhumane number of pumps, but the odd customer will come in with a specific figure in mind. And that figure usually amounts to over a dozen pumps.
So, to teach such people a lesson, the OP makes sure to add the exact amount of syrup per the customer’s request. Of course, the drink will taste like a cup of type 2 diabetes, but hey, the customer asked for it, right?