New COPPA Laws Mean Age Gates for Most of the Internet (lexology.com)

The updated COPPA laws that go into effect on July 1, 2013 will require that most websites implement age gate technology to prevent collecting personal information from kids under 13. Even sites that do not specifically target children are advised to add age gates to avoid accidentally collecting personal information.

For example, the data that Google Analytics tracks about each user (specifically geolocation) technically qualifies as "personal information" under the new law, so if you're using GA you will likely be in violation of the law if anyone under 13 visits your website.