Trying to shut down a site by going after their domain names will always be a losing battle. As long as the link on their Wikipedia article keeps being updated, it'll remain easy to access. And it would be a pretty shocking attack on free speech if a U.S. court tried to order the Wikimedia Foundation to take that down; I suspect the public response would be similar to when the movie industry tried to get the AACS encryption key taken down in the 2000s.