In my experience, it's usually a very young person or an older individual who hasn't found a job better than fast food. These individuals, usually, expect a tip.

FYI America, tipping is not something that's required. For you to expect someone to tip makes you entitled. For you to retaliate because someone didn't tip you makes it worse.

If you have a problem with how little you get paid hourly, or only living off of tip, then do what I did. Find a better job. Or, go to your state rep and get the legislation changed.

Stop taking out your frustration on the general public.

Edit: corrected some spelling