An easy way is to make the domain point to localhost so you'll get a connection timed out error (unless you have a web server on your computer). If you're on windows, edit:
c:\winnt\system32\drivers\etc\HOSTS
(or something similar depending on how your version of windows was installed)
with notepad and insert these two lines in it:
127.0.0.1 www.digg.com
127.0.0.1 digg.com
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