why do the media accuse Obama of having fake twitter followers?

[liberal.i.am]

A new Web tool has determined that 70% of Obama's crowd includes "fake followers," The New York Times reports in a story about how Twitter followers can be purchased.
http://content.usatoday.com/communities/...DeWkmwnjfC
it just shows you how low conservatives will go to ruin the presidents good name

[Norm]

Ruin the President's good name?!?!!

HA! HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA!!!

Obozo ruined his own name (which was never that good in the first place) by destroying the economy and snubbing his nose at The Constitution. Heck, he's having to put his campaign expenses on credit because he's not getting the monetary support he received in 2008 when he ran on the empty promise of hope and change.

The Obamabots are so desperate I would not be at all surprised if they're creating fake followers on Twitter.

[Chewy Ivan 2]

I don't know. I don't even know why I should care. It's not like I ever found Twitter or the number of followers people have impressive.

I am curious how they determine "fake followers." It sounds like most real Twitter users would be considered "fake," following the tweets of many celebrities without many people following them.