Yeah, that's good. A lot of people want to filter them. There'd be no way to keep pornographic or sexual content constrained to a .xxx domain even if regulations were implemented to try to make it so. I see it as a convenience for consumers, not governments; if we get to the point where the government is censoring the internet, I don't think the fact that there's an .xxx TLD is going to be that big of a deal. They'd all just bleed over into .com space again surreptitiously.

See how well they're doing stopping piracy of normal media? They'll do even worse stopping pornography. There's nothing to fear from a .xxx domain.