Hi,
I am referring to post number 1 and his/her subsequent postings. If a VM employee had posted a message to me like that, I would soon be in touch with senior management.
I still believe that the disclaimer would be no defence in disciplinary proceedings or an Employment Tribunal if management decided that you had posted something inappropriate. I have been reassured that such disclaimers are not a passport for staff to be rude or disrespectful to customers, nor for the company to be painted in a bad light.
For example, your disclaimer states "The postings on this site are my own and don't necessarily represent Virgin Media's positions, strategies or opinions." What if you decided that "your opinion" was that VM is a bad company to work for, that you hated working for them and posted to say so. Do you really think that management would dismiss this as merely "your opinion" and take no action ;-)
Fortunately, common sense and courtesy prevail in the vast majority of cases and it is seldom that postings from VM employees are an issue