[tor-talk] Tor and Spamhaus.

[blobby@xxxxxxxxxxxxxxx]

I was looking at exit nodes on http://www.ip-score.com/ which checks 
dozens of blacklists. Typically, each exit node is considered bad by 
about five blacklists. I've checked about 15 exit nodes and all are 
blacklisted by xbl.spamhaus.org and, by extension, zen.spamhaus.org (zen 
is a compendium of all Spamhaus' blacklists; if an IP is in one then 
it's in zen).

Virtually all are in cbl.abuseat.org which is the Composite Blacklist 
which is a part of Spamhaus.

Yet most blacklisting services do not consider exit nodes to be dubious.

This situation would not be an issue except for the popularity of 
Spamhaus.

Question: why does Spamhaus in particular target exit nodes? Does this 
have an effect on Tor users? How is Spamhaus actually used? For example, 
if I go to Craigslist and can't use the website  and get "This IP has 
been automatically blocked" or when I login to Gmail I am forced to 
verify myself, is this related to Spamhaus' blacklisting?
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