Things get a little heated over there fo sure.
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To reduce the number of infected surfers on your own site put this in your .htaccess:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} zango|seekmo|hotbar|hbtools [NC]
RewriteRule ^$
http://www.yourwarningpage.com/warning/index.html [R]
or instead of your own warning-page add this:
http://www.adwaresucks.com/zango/
The more sites that do this the better it is as hopefully the infected surfers will learn something.
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The code has been posted in a number of places. This came from the webmaster at thunder-ball.net.
Not the answer all, but prolly helps some.