It is no different than linking to any third-party / external resource. Specifically, profiling information is delivered across the referrer and user-agent to n

It is no different than linking to any third-party / external resource. Specifically, profiling information is delivered across the referrer and user-agent to name a few. There is a more complete discussion on the network security stackexchange group[0]. [0] http://security.stackexchange.com/questions/38415/privacy-risk-in-using-google-apis http://security.stackexchange.com/questions/38415/privacy-ri...