I have a crazy idea for this: legally mandate that any business that excepts tipping must allow negative tipping, up to the same max percentage the positive tip

I have a crazy idea for this: legally mandate that any business that excepts tipping must allow negative tipping, up to the same max percentage the positive tip can be. Places that are high-end/service oriented will then allow tips, because the vast majority of customers will. Maybe even your local fancy bar would ban you for leaving a -10% tip. But subway? They’ll turn that off immediately because almost everyone will hit “-10%” given the chance. This one trick would clean up the entire space overnight