Most professional settings would not have permitted these company chat boards in the first place.
And even externally the only thing that was verboten was the uk.telecom hierarchy - this was more to not encourage some of the internet kooks.
Bringing anything else into the workplace is an unnecessary distraction from both the employee’s and employer’s standpoint. I go to work to have money deposited into my account twice a month and go home to spend time with my family and friends. The more time I spend at work spending energy not doing work either I will be less effective or spend more time away from family/friends/hobbies to be effective at work.