Back in the before-times when we had all-hands meetings, my boss had a running game where he would randomly call the cell-phones of people who were presenting or who were sitting in the audience, to see who'd forgotten to leave their phone on vibrate. Some people have very interesting ring-tones...

Sexual harassment lawsuit coming in 5.. 4.. 3... Just kidding, I hope you only mess with male presenters.

Wouldn't discriminating who I mess with based on gender be sexist?

You’ll have to send the same message to your female coworkers in the name of fairness.

You could claim you meant to send it to someone else. It might lead them to doable those notifications.