Why the .xxx would anyone want a top-level domain for porn? by Seth Finkelstein
The idea of a “.xxx” web suffix for porn sites is the internet’s vampire: it seems nothing can kill it. Censors often oppose it because they believe anything that can be construed as legitimisation of pornography will hinder their efforts against it. Civil libertarians oppose it on grounds such as the threat of it being used to marginalise a wide range of material having to do with sexuality. Adult webmasters widely view it with suspicion, as anyone who has a ghettoisation scheme to “help” them usually isn’t doing them a favour.
http://technology.guardian.co.uk/weekly/story/0,,1997492,00.html