How social are Social media?

The increasing presence of corporates in social media like Facebook, Linked In, Twitter does not augur well. Their presence is only making social media into commercial media.
Time for these guys to create two separate classes - social and business class.
And consumers should have a choice - do I go for social class or business class or both.
This not only segregates my social life from business; but also opens up a different revenue line for the media.
Let us keep our social media social; let's stop the commercialising it now.