There was a recent story and was accompanied with a picture of a receipt. A single mom racked up a bill of $138.35 and then wrote in the spot where the tip should be "Single Mom Sorry." Then she wrote, "Thank you it was great."
First, who are I to judge. I am not.
Have you ever stiffed a waitress or waiter? I used to be really harsh until I dated people who were servers, and they left good tips. I think that you have to decide it you can afford the tip before you go out. If you cannot, they you don't go out.
Besides that, if you have a server who is rude, that is one thing. Then less tip.
I once was at a 50's Diner in Pennsylvania and a young high school girls spilled ice and water all over our table. She then ran back to clean it up and slipped on a piece of ice and ended up sliding under our table. She was fine, and although I was a poor, poor college student, we left her a huge tip.