The 1840s!
The United Kingdom is undergoing some soul-searching on the subject of internet defamation. Their laws regarding libel on the Internet date back to the 1840s, and are a tad outdated at this point. However, there is another defense against internet defamation other than the legal system–online reputation management.
http://www.google.com/hostednews/ukpress/article/ALeqM5gD3i3isIsXO6_QuNoSUSWDpHpZsg