Dravyk, you are of course right.
However, it is worth mentioning that it isnt only the people who rep for specific companies that do what you mentioned, in some instances, its the company owners themselves.
Epic Trash for example yet, because of the mentality of todays 'webmaster' this type of behavior HAS (whether we accept / like it or not) become somewhat of a norm and as you said in your original post, it is spreading.
Hell even on Cozy Campus which i consider to be one of the more sane and friendly forums in the industry they had outbursts recently.
Then when you ban a disruptive board member, they get their friends and business associates to further disrupt the board on their behlaf (as happened on GWW recently).
As forum owners, we really are in a no win situation as long as this type of mentality continues to spread and, as long as it does continue to spread, the overall usefullness of those boards which do pride themselves on being businss orientated will continue to decline
