[ChuckMcM]

So imagine you are a black hat for a moment. You've run your drive by malware campaign and harvested a couple hundred thousand Google login credentials, or maybe you just sit and wait and when the browser is open you send a +1 to the site your master told you to send it to.

So now Google has hundreds of +1 votes coming from otherwise legitimate users. How do they fight that?

[vaksel]

remove SEOshop from organic results, and block them from Adwords until they shut down the operation.

[felipemnoa]

Good point. Had not thought of that. Although it would probably become kind of obvious that there is something fishy going on. Why would a site that has no real value all of a sudden start getting a lot of +1s? They would have to be really subtle to go undetected.