Adequate warning of the consequences of running an exit node.
On the Sharing tab of the settings window, when "Relay traffic for the Tor network" is selected, a prominent warning should be displayed that your IP address will be banned from half of the internet. I can't use Wikipedia. I can't use IRC. Who knows what other services I have unwittingly lost access to, due to what I thought was a worthy cause.
Trac:
Username: coder0xff