What really needs to happen now is for lots of people to start registering domains for (preferably high profile) non-adult content websites.

Water down the domain so it no longer means much, so filtering by it becomes destructive.

Nice try, ICM Registry! (Domains are $200 p.a.)

That's not all that bad, all things considered. I probably spend more on breakfast cereal.

For that to be effective, any and all pornographic content in every other TLD will have to be banned. I don't see that happening...

That, IMO, is the reason for .xxx -- to make life easier for those who want to censor the internet.

I get the impression that the people who are blocking porn would not be customers of porn sites. In other words, only people who don't want to see .xxx sites would block them. So why is that any different from the AdBlock that I run in my browser already?

AdBlock is a personal decision and only affects what you see.

.xxx-blocking is likely to take the form of censorship and will make it easier for the censors to affect what other people see.