I still don't understand the point of your comparison
Most posters on forums represent nobody but themselves, posters who declare that they work for a particular employer have an additional responsibility to ensure that they do not bring their employer into disrepute.
In essence, most posters are answerable to nobody (as long as they abide by the law and t&c's of the site owner). A poster who chooses to declare who his/her employer is leaves themselves open to disciplinary action if they aren't careful about what views they air and/or how they express themselves.
I have noticed that some people who work for VM make a statement that their posts are made as an individual and may not be representative of VM. Whilst this, in fact, may be true, this statement would provide little defence during disciplinary proceedings or at an employment tribunal (ET).
I know this because an ex bar manager of ours hit a woman in another persons bar whilst off duty. She was immediately dismissed as we do not employ people who indulge in such behaviour. We were also very keen to avoid any bad publicity for the business.
The ET dismissed her claim for unfair dismissal on the grounds that, even though she was off duty in a different bar, she was well known as one of our managers and that her conduct reflected on our company. It was also noted that she had broken her "duty of trust" towards her employer.
The OP has, in my view, by the very nature of their post, including the tone and content, tarnished the image of VM. VM management do monitor internet forums, so I would suggest that s/he thinks again before posting such comments in that fashion again.
RC