Even those who've never done the job can appreciate that being a server is hard work. You've got to be good at multitasking, keeping multiple demanding customers happy, and you're meant to keep a smile on your face the entire time. What's even worse is that your living depends on whoever is generous enough to tip, which is something that @biglez7704 declined to do when she ate out at Metro Diner recently.
Claiming the waitress who attended to her was rude, she wrote on the receipt that her "tip" for the server was to "Do better". After posting a video about her actions, though, people were less than impressed. Joking about her being broke and accusing her of having a bad attitude as a customer, it's uncertain what exactly led to her skimping on the bill. However, it's almost always bad practice to be cheap, even when the service isn't the best.