Earlier quoted context omitted.
This mentality is most likely why I usually never tip. There are people out there that honestly think this is normal behavior. Hey your experience was terrible, but have this $5 your don't deserve. I live in the US and only tip when service is good.
You are, for all intents and purposes, stealing from people poorer than you. The default assumption is that customers will tip at least a reasonable amount for all service. If you aren't going to do that you need to announce your intentions in advance. Whenever you go to a restaurant just let the hostess know your plans. That way you won't be deceiving people who are serving you.
If no one tipped it would fuck up the ridiculous system and help the workers.