Some people think they have a god given right to travel where they like and when they like
This has never been the case
Typical. Muslims get stopped and questioned wherever they go.
A Facebook follower alone isn't reason enough in my mind to revoke some bodies visa, even if said follower is questionable (though that obviously changes if there is more than just a Facebook link between the two people). Like the previous times I don't feel the us has any obligation to reveal why the visa was revoked and I feel that this a mountain over a mole hill.
There has to be more to it than this. I highly doubt the US authorities browse through the social networking profiles of everyone who applies for a visa and looks at who they are friends with or followed by.