Could Media Get Too Smart about Consumers?
techonomy.com
techonomy.com
The problem IMO for online marketers is if your only doing one add you need to target the most likely purchases which get's you back into the creepy.
Edit: http://www.forbes.com/sites/kashmirhill/2012/02/16/how-targe...
Based on Charles Duhigg's very good book about habits.