Here's the part you missed:
The IP list thats included in the commit:
http://pastebin.com/F15aHDMJIt doesn't need to be downloaded from tor project.
They are just all tor exit nodes!

What do you think that they'll care about this?
They are public servers, they work as public servers!
XT isn't even going to give a shit about them until it receives a possible DoS attack.
And it
isn't going to connect them, it will just put them under a low priority, to avoid getting too many connections from them (because the DoS attack)
See? I guess you're the parrot. I said they put up a list of black listed ip. And they did. They get low priority. How can this be exploited, how easily can ips be added to the list is beside the point thats up to the code engineers to decide and i trust them over you;
Leave me alone.