Great article by Mashable. Obama Has Millions of Fake Twitter Followers [UPDATED]

The point is a tool was used to test whether followers were "real".

Obama Has Millions of Fake Twitter Followers [UPDATED]

President Obama has nearly 19 million Twitter followers, but 70%, or approximately 13 million of them, are fake or “inactive,” according to a new analysis.
About 30% of Obama’s followers — or 5.7 million — were labeled as fake by the analysis, while nearly 40% were found to be inactive.

Mitt Romney’s Twitter account, meanwhile, has less than 900,000 followers according to the analysis, but only 15% of them, or about 135,000, are considered fakes.
The numbers come from Fake Follower Check, a tool from social media firm StatusPeople that analyzes a sampling of a Twitter account’s followers and checks for telltale signs of fake followers. Fake accounts are those thought to be created for the sole purpose of sending spam, while inactive accounts lack recent updates.

“Fake accounts tend to follow a lot of people but have few followers,” Rob Waller, founder of StatusPeople, told the New York Times in a story about buying and selling Twitter followers. “We then combine that with a few other metrics to confirm the account is fake.”
So... what do you think? Is it really worth building a huge stable of fake followers on Social Networks? Is it worse to have a low number of "real" people or better to seed it with fakes and hope like heck nobody points it out?