Thats me exactly.
My thought in my mind if I have pretty bad service is "PLEASE, give me good service. I really do WANT to give you a good tip" .
I was at an Olive Garden in Dubuque, Ia. Had a fairly new waitress. She was just TRYING her hardest. Problem was, the steak dish I had, the meat was almost raw inside. So, I had her take it back. I never send food back. It came back and I can't remember if it was still raw or if it came back well done, but either way, it was OBVIOUSLY bad.
The girl got the manager, and the manager got me another meal and picked up the check for the 2 of us. You could see the waitress was just destroyed. I thought she was about to cry.
When we were leaving, I stopped by the manager and asked her if they did tip sharing. She said"no", and I made sure to let the manager know that the tip I left was for the waitress and the waitress alone. I also told the manager what a great job the girl did, and that she (the manager) needed to tell her. I wanted that girl to know that I KNEW how hard she tried and her tip was based on her work, not the cooks problem.
Those folks just don't give a poop. Tipping really does make a person go the extra mile.
And I disagree on "tipping jars" at Starbucks and other "just give me my order" places for this reason. They haven't really done anything special except hand me my food. I WOULD tip if I had something special or intricate or difficult that I ordered.