There are legitimate reasons to not tip someone. Being a cashier typically does not necessarily obligate someone to tip you. Lots of times people will say "keep the change" at a fast food restaurant and the workers take home maybe $10 each on a busy shift, but that isn't really tipping.
If you hate legitimate "tipping culture" so much, stop making it the minimum wage earner's problem that they work for a shitty employer and start boycotting places that refuse to pay their workers a living wage.
Yes, everywhere and everything. Every stitch of clothing you wear, the home you pay for, the food you eat, it's like six degrees of Kevin Bacon but for sin. Live in an abandoned cave in a forest on the moon or you're supporting someone you don't like.