How does the US Federal Government shut down a website?
Stated differently, from a technical (not legal) standpoint, when you visit a website that displays a federal notice stating that the government has "shut down this website," how do they replace the original website content with their "shutdown notice" content?
Do they confiscate the domain directly from the registrar?
Do they call up ICANN and/or the United States Department of Commerce and ask them to "poison" the Root DNS servers for them?
Do they call up your hosting provider and ask if they can upload a new index.html and maybe an a cool new gif or jpeg or pngfile -- oh and by the way, change the sysop's password while your at it?
OPED: If serverfault isn't the right place for this question, then where is the right place? It seems to me that anyone who runs a web/mail/dns/* server should be interested in this question.