Sure, but if I send a group of friends a personal email (not company email, not company email address, not proprietary company information) saying I’m not feeling well mentally, that’s not “social media” and I don’t see how sending a group message via a messaging app is either. What if I just write a hand written note, photocopy it, and send it to the same people, is that “social media”?
I will endeavour to follow company rules on social media but that doesn’t stop me thinking some of them are stupid.