pessoal
Façam o bloqueio dessas paginas nos firewall de vcs...
http://www.4proxy.com/
http://www.a1proxy.com/
http://www.alienproxy.com/
http://www.anonymate.com/
http://www.anonymizer.ru/
http://www.anonymousurfing.info/
http://www.anonypost.com/
http://www.anonypath.com/
http://www.anonypath.net/
http://www.antiwebfilter.com/
http://www.aproxysite.com/
http://www.bypassit.net/go.php
http://www.backfox.com/
http://www.bigproxy.org/nph-proxy.cgi
http://www.blockmy.info/
São usadas para acessar orkut, entre outras coisas...