A study from DNS-resolution service OpenDNS, "2010 Report on Web Content Filtering and Phishing" details just what sites companies were most likely to block last year, be it social networking websites or sites that have a reputation for fostering procrastination.
Top Ten Blacklisted Websites
Blacklists are typically used when there is no desire to block an entire category in principle, but there is a focus on preventing traffic to specific websites based on a combination of their popularity and content.
- Facebook.com —14.2%
- MySpace.com — 9.9%
- YouTube.com — 8.1%
- Doubleclick.net — 6.4%
- Twitter.com — 2.3%
- Ad.yieldmanager.com — 1.9%
- Redtube.com —1.4%
- Limewire.com — 1.3%
- Pornhub.com —1.2%
- Playboy.com — 1.2%