I'm curious does it matter if its a previous employer? what could they possibly do?
For example, I once had a coworker that would openly crush up and snort various pills between calls while fundraising for one of the two main political parties. This was not an issue for management.
I would never post [name of that employer] from any account that could possibly be attached to my name anywhere.
Just curious, and I agree it's unprofessional. I can be quite judgemental, though.
Edit: This is the funniest exchange I’ve had on this website, thank you. “Preferring people don’t do lines of apparently excruciating substances right next to me, at work, in an office, while I’m literally on the phone” being “moralizing” is hilarious.