Alternatively: Message that to the group as a whole, then say whoops you only meant to send it to one person directly. Never send it to anyone directly.

Ah, so you're playing Paranoia then

Friend Computer says you want to look at Paranoia

I accidentally (almost) did this for a one-shot.

I gave the players a brief scenario summary and three of them choose secret-aligned-with-the-enemy or mercenaries working for the enemy. The last, unwitting player, chose to be a goody two shoes good guy.

Before it really got off the ground, the players were expected to step in and stop some bad guys from beating up a commoner. The 'good guy' did, and all the bad guys and bad players turned on him.

It was a little funny but a big sigh moment when they figured it out.

Paranoia ttrpg