Cmv:i don't think you should tip at all good or bad services, it's an out dated custom that just encourages employers to pay sub standard "tipped" wage.:
I never tip, I think It reinforces the notion that employers can get away with paying a sub standard wage to people based on their chosen occupation, I think tipping should be abolished and in it's place employers should be legally obligated to pay. Realistic and survivable wage then if people decide to tip then it should go directly to the server. 

I've never understood why employers are allowed to pay 2$ an hour and society is expected to pay their employees wages while they soak up more profit by avoiding paying their employees a realistic livable wage, and I don't feel anyone should be guilted into paying X percentage on top of the bill at a restaurant to pay the servers wage wen it should be their employers