That's an instant firing and a blacklist for any references where I am.
What actually happens, is the server might ignore your table, or tell the kitchen it's a bad tipper so don't worry about ticket time. That's only when it's a multiple-repeat offender.
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Yes, you will, because part of costing out menu items is labor cost. If labor costs increase, so will the menu cost. It won't be a 1:1 increase, but it will be one.
Edit: If you've never dealt with the public... It's much more than serving plates.