For more on the entire Tynt issue, see Eric Lander’s blog post on Tynt.
If you’re on an Apache server with mod rewrite & want to prevent Tynt from displaying your site here are some rules that may help:
RewriteCond %{REMOTE_ADDR} ^204\.244\.109\.(2(4[0-7]))$ [OR] RewriteCond %{REMOTE_ADDR} ^204\.244\.120\.(1(7[6-9]|8[0-3]))$ RewriteRule ^(.*)$ [F]
You can do plenty of other fun things instead of “RewriteRule ^(.*)$ [F]” if you like. For an example, check out the 404 page for SEOconsultants.com
Many thanks to @IncrediBILL, @pageoneresults, @scottpolk and @ericlander for bringing the situation to light & coming up with the correct IP blocks.