Is This Behavior Really Not Acceptable, or Am I Overreacting? Alternatively, for a more direct approach:

It’s *so* confusing when this happens. Like, did I miss a meeting where we all agreed this was not acceptable?

Might depend on the crowd too. What flies with friends might not with coworkers, etc.

For quick gut checks, the “Grandma Test” works: would you say/do it in front of your grandma? If not, maybe rethink it.