#2 - http://techcrunch.com/2010/05/11/yelp-security-hole-puts-facebook-user-data-at-risk-underscores-problems-with-instant-personalization/ http://techcrunch.co

#2 - http://techcrunch.com/2010/05/11/yelp-security-hole-puts-facebook-user-data-at-risk-underscores-problems-with-instant-personalization/ http://techcrunch.com/2010/05/11/yelp-security-hole-puts-fac... Facebook actively hands over your data to partners Google does retargeting the right way. I don't how you make the assumption google shares more, cause google is very open with their ad retargeting. It never shares any personal identifiers just general aggregate data. #3 .. People won't admit it but its a fact.