Try to have some self esteem. If you don't feel like you can stand up for yourself feel free to give them a 100% tip or whatever, maybe they'll cheer for you as you leave. Perhaps other people watching will join in.
Again, your compensation is between you and your employer. If I don't tip, perhaps your employer should be paying you more. Raise the prices to account for this.
Again, your compensation is between you and your employer. If I don't tip, perhaps your employer should be paying you more. Raise the prices to account for this.