BBC NEWS | Technology | Delay for .xxx 'net sex' domain

Quite honestly, I'd rather have all pornography related sites at the .xxx domain than accidentally stumble across material that is personally offensive to me by mistyping a site name.

Yes, having a specific upper level domain under which all adult content is aggregated will make censorship easier, but I don't think that's the true concern. What it will do is make the companies that sell software to block those types of sites all but obsolete since the various browser makers can program in a switch to block or allow the triple x domain with the click of a button.