I wish there was a secret handshake or a badge that identified you to other retail workers as being a current or former retail worker so they know you're not just another dumb customer.

It would be something only a retail worker would get like a special pin with a shopping cart or a register on it and it would have no other words on it. A handshake or sign would be cool too. It would let people know that if you're waiting in line because someone called out and that person is the only one ringing up customers, you understand and it would mean instant empathy. Customers act shitty to retail workers and servers because they think they are beneath them and that's bullshit.

You would be sworn to secrecy and if it was discovered that you told someone other than your SO then you would be excommunicated and treated poorly by retail workers for some set amount of time.

TL;DR: A special symbol to show other retail workers and servers that you get how much the job sucks so they wouldn't feel like all customers suck.