I dont get this tipping thing, why would you feel obliged to tip someone for doing what their paid to do?
They're paid to serve you. How well they serve you is up to you. You would be better off wearing a sign which says, "I don't tip well," so they won't have to waste their time.
wrong.
they are paid to serve you
their job is to serve you
they are paid to be pleasant and efficient.
tipping is optional.
Tipping should be optional - its crap that they get paid such a shit wage, but the public is not responsible for making up for those low wages.