Might be. It is definitely a thing, though.
Oh I have no doubt about that - maybe there's a story behind their strictness. Maybe the companies I've worked for have not yet had an employee publicly embarrass the company to such an extent, that they felt the need to make this a mandatory part of employee onboarding.
That sounds unethical, to say the least. Did they verify if you actually did it, or just “suggest” you do?
There was no top-down verification, but I worked with a few Grade A suck-ups, who would proudly volunteer information on which accounts they used and which posts were theirs. I kept politely ignoring the repeated verbal requests until management moved on to their next big obsession.
What do people do then? Play a game of chicken? Come to a full stop on the ramp? Crash into each other?