You should take a look at …wikipedia.org/…/List_of_US_states_by_minimum_wag… and see what the minimum wage is in the state you are visiting. The minimum wage where I am is one of the highest in the nation so I don’t tip anymore.
Edit: I am aware many states have below federal minimum for tipped employees. My point was if they’re visiting one of the states with a high minimum wage, they should forgo tipping. Nobody below bothered to link it, but here’s the minimum wage page for tipped employees: www.dol.gov/agencies/whd/state/…/tipped. It’s worth noting that even in the states that can pay tipped employee as little as $2.13/hr, the employees never actually make less than the federal minimum of $7.25/hr because the employer has to make up the difference if the employee doesn’t make enough in tips, not that $7.25/hr is even remotely a livable wage in 2023…
Regardless, tipping is an inherently flawed system, and it’s not the responsibility of the consumer to pay specifically the server a living wage while everyone in the kitchen suffers (I would know, I’ve been there). If you’re not happy with the wage laws in your state, get involved in politics and exercise your right to vote to do something about it.