[lolwutf]

I certainly hope you don't carry that attitude with you throughout life. Tip your bartenders and pizza delivery guys... they make nothing, anyway. (And, if you're in tech, chances are an extra $2 for a tip is NOT going to break your budget.)

[snowwrestler]

I think tipping well is absolutely one of the best returns on investment available in life.

From a selfish perspective: a few extra dollars can make a huge difference in service, particularly services you use repeatedly.

From a humanity perspective: a few extra dollars can also make a big difference in the life of the person you're tipping...usually jobs with tips do not pay very well.