This thread has really entertained me...
But my .02
If I want to go someplace and get subpar service and people who are generally unhappy, I'll go eat fast food.
Multiple people have said in this thread "if you can't afford to tip, you can't afford to eat at a place that required it"...and i say I disagree with that 100%.
When I go to a nice sit down restaurant I expect two things..both of which I'm willing to pay for if they are met.
1. Good food
2. Good service
Most of the time, the two should really be seperate things that just automatically happen. It's also usually not the waiter/waitress fault if your food is bad. It could be their fault if you get cold/not hot food (if it was sitting and the waitress/waiter wasn't paying attention).
A lot of places you go (at least around here) if the food is bad/cold, they won't make you pay for it, or they will reduce your meal price. So that's the first thing I look at: How was my food? Did it meet the level of expectations that the restaurant says it should?
Now onto service: Again, I go to a sit down because I want to be taken care of, and I expect a certain level of professionalism and attitude. I also understand people have bad days (I have them). So I will tip accordingly. Have I ever not left a tip? I can honestly only think back to one time that I did not leave a tip, and I actually complained to management because the waitress was so crass and rude. Bad day or not, there are just some things you do not do or say when taking care of a customer.
I tip fairly well I think, and I try to give extra to those who I think do outstanding jobs while servicing me and my family. But here is the thing I realize: The only person in the world who is me...is me. We are all different, we all have different standards, etc. So I have no issue with how anyone else tips, because that is up to them. I do think, though, that each and everyone of us should be courteous to the people who wait on us, no matter how they treat us. If they are rude, be polite...but I'm not saying be polite and tip them well. That's on each and every one of you and your discretions.