What would you do if there was one day a year where retail workers had a license to fight back?

I would love to have one day a year that is deemed "Retail Worker's Day" where we get to say anything we want to customers and cannot be punished in any way. I know it will never happen but I can dream. It would be sooooo sweet. I would wait all year to say "Get the fuck out of my store you dumb ass piece of shit!"
What would you do on that day?