What can i do to present myself so wait staff doesnt think i am a crappy tipper?

Its ashame how some ppl can be so ignorant but if I was u I wud give ppl like that, who judge by looks, an extra small tip and then laugh n their face. Lol. They serve you, so don't go out ur way 2 make them happy. That's their job 2 do. ;-). A nice additude goes a long way and if they don't kno dat then they will jus have 2 learn.