Interesting to see the backlash to this: Google May Offer New Way to Target Ads

It’s interesting to see the backlash to this especially since Facebook (as described in the article) and Twitter both offer a similar product.  Will the backlash grow big enough where it’ll effect FB’s and Twitter’s offerings too?

Google is in talks to allow advertisers to target ads in search results at their existing customers, according to people familiar with the matter. Google has suggested that advertisers hand over customer information such as email addresses, which Google would then use to target the ads, the people said.

via Google May Offer New Way to Target Ads – WSJ.