So lets do this, with a fun smile and a twinkle in our eye:

After finishing screening, after putting our shoes back on a verifying that all our valuables are still where they were before we last really looked at them, just before we turn to go to Starbucks, we turn with a slight twist and to screening crew give them a friendly, albeit deceptively snarky, "Code Bravo, blue crew" and a wave, as we hopefully disappear into the terminal.

It would mark us to each other, it would mystify the other PAX leading to questions we could answer, and they would have to quietly take the ridicule they so richly deserve after they can do very little more about it.

This really can be fun..... (My wife really does not like my devious side.)