Some times ago we have a thread about SORBS and many exit nodes were
listed in this DNSBL with the attribut "trojan hacked". Conclusion of
the thread was: "They have no glue!"
Yeah .. well SORBS is to be taken with a grain of salt.
Google sometimes does not work with several exit nodes and give you the
message "You may have a virus or malware, please clean your computer!"
(or something like that).
As do Slashdot, Craigslist, and a bunch of others. People tend to be
jerks when they are anonymous .. and yes, it is sort of the "price you pay"