Recently, the Internet Corporation for Assigned Names and Numbers (ICANN) approved .xxx to join the elite ranks of .edu, .org, and, of course, .com as the next domain extension. As the name implies, .xxx will effectively try to create a voluntary Internet red light district for pornographic websites. It’s not hard to imagine why .xxx would be controversial, but why is .xxx necessary? The reasoning is that it will be far easier for search engines, employers, and schools to block any domains ending in .xxx. While this is good news for schools that want to protect against adult content, it…