Microsoft Attacks Google on Gmail Privacy - NYTimes.com

Following this logic (consumers creeped-out by potential privacy concerns), neither Facebook nor Twitter should exist; also see Incoming! Microsoft Launching Another Pathetic Smear Campaign Against Google (Readwrite)

"On Thursday, Microsoft plans to unveil a new print, television and online advertising campaign that attacks Google on an issue that Microsoft believes is one of its great vulnerabilities: privacy. The ads will showcase research that shows most people don’t know that Web e-mail providers like Google scan the contents of their e-mail messages to deliver personalized ads to them — and when they do find out, they don’t like it.
If Gmail was a physical product, Microsoft’s actions would amount to putting a sticker on it that said, “Warning: Google is creepy.”"

Microsoft Attacks Google on Gmail Privacy - NYTimes.com