Well, either they have the copyright or a very exclusive license.

    When you're talking about things like "V for Vendetta" or "Watchmen,"
    I don't have a choice. Those were works which DC Comics kind of tricked
    me out of, so they own all that stuff and it's up to them whether the film
    gets made or not.

http://www.mtv.com/shared/movies/interviews/m/moore_alan_060...

mine has a label inside indicating it was made under license from the movie rights owners.

Obviously, the moral thing is to make your own. ;-)

Mass-production, however, has some interesting advantages. It's harder to trace it back to its owner, for instance.

quite the opposite. it makes it rather easy to cross-reference amazon orders of said mask with politically active online accounts via isp records to identify suitable candidates for future re-education internment camps on the topic of IP and state rights. could be done using the ironically libertarian-funded Palantir, i suppose.

You could also purchase it locally with cash at a costume/mask shop...

Extra points if you buy a fake version made in China and brought illegally into your country of choice.

I'm as tinfoily as the next guy, but I don't think buying a mask on amazon is going to land you in a reeducation camp. Wearing a mask hardly makes one a Ted Kaczynski.

The point is if you DO turn out to be a Ted Kaczynski, having these kinds of purchase records on file make it easier to find you.

Did they buy it from the comic?