Tipping is the #1 easiest way to find out if someone is a bad person or not.
tipping is an immoral system and everyone who participates in it helps to perpetuate that system, and hence is at least partially responsible. however, i disagree that it is a good means of determining the quality of a person's character. whether people participate or not is largely determined by the location of their birth.
it would be more accurate to observe that tipping slowly, but inherently, warps and perverts the character of those involved. maybe that's what you were trying to say.