One option is to outlaw asking for a tip at a place of business. No screen prompting for a tip, no slot on a receipt to accept a tip, etc. Nothing could be disp

One option is to outlaw asking for a tip at a place of business. No screen prompting for a tip, no slot on a receipt to accept a tip, etc. Nothing could be displayed conditional on purchase (such as a receipt, a PoS terminal, etc.)