Hey all,

Just wanted to point to Sadia Afroz / David Fifield et al's research on differential treatment of anonymous users -- such as CloudFlare's blocking of Tor users. Unfortunately, it's not "just" CloudFlare (which holds substantial market share) and it's not "just" Tor users who are impacted by these things. It's a good read:

http://www.eecs.berkeley.edu/~sa499/papers/ndss2016.pdf

One curious finding is that some sites only block large exits. I'd be curious if an intended side effect were the ability to say "Oh we only block 15% of Tor exits" rather than saying "We block [>>15%] of Tor connections". Thoughts?

~Griffin