I submitted a similar story recently, but felt it was important enough to post again. We're just learning about the implications of the new COPPA laws that go into effect on July 1, 2013. It looks like many of the websites in the US will need to update their data collection policies (incl. Google Analytics, Optimizely, retargeting cookies, etc.) or otherwise implement an age gate before users can access the site.
This is bad for the internet... unless you build age gate technology.