The main purpose of the .xxx top-level-domain was to allow parents and companies to easily filter out sites that would be inappropriate for children, and, possibly, for certain work environments. It would just be a question of blocking all requests for sites that ended in .xxx -- or IPs that reverse-dns-resolved into .xxx.
Apparently, the right-wing Christian groups seem to think that's actually a Bad Idea -- they are the ones who do not want to make it easy for parents to prevent their children from seeing pornographic content.
The hypocrisy is mind-boggling. Then again, as I said before, never try to explain with malice what can be adequately explained with stupidity...
The Internet Corporation for Assigned Names and Numbers (ICANN) rejected the .XXX top level domain earlier this month. ICANN, the American-based organization that allocates Internet domain names, voted down the .XXX domain that would be reserved specifically for pornographic web sites. According to The Register:
There is already significant evidence in the 1,600 documents provided under the Act that the United States government lobbied hard against .xxx, having come under significant pressure from domestic right-wing Christian groups, to the extent that it actively solicited other governments to complain against .xxx and even threatened to overrule internet overseeing body ICANN if it did agree to the internet registry.
While .XXX has been shot down, the .TEL domain was recently approved by ICANN. Telnic believes the .TEL domain will "offer the first genuinely different use of domains since .COM was first created."