Anyone using TBB or TAILS has nothing to worry about.The Tor Browser Bundle, actually the TorButton plugin, hooks dangerous javascript, blocks flash and ActiveX objects, and generally doesn't allow executable objects or scripts that could un-mask your IP address.The remainder of the paper deals with exit nodes using non-encrypted protocols, which everyone should know is a no-no when visiting surface web sites which use exit nodes.None of that paper applies to the way tor is used here, and it's really written quite poorly as well.