If only companies have the right to participate on the internet, they are empowered even more to chose who should be allowed to even run a website.. It's a slippery slope that ends up in a very bad place, participation wise. It becomes like the airline industry, where the companies pushing hardest for more regulation and red-tape are the oldest, those who made their fortunes back when it was easier and cheaper, and who now use their enourmous wealth to make it harder for new players to enter their market.
It's the same everywhere, when you start allowing power to concentrate.