While Comcast has been getting a lot of flack for blocking BitTorrent, some network neutrality activists have also been calling out Verizon for the way its DNS servers work. The DNS specification requires that servers return an error if the user tries to look up an invalid domain name. Instead, Verizon's DNS servers re-direct users who mistype an address to a Verizon-branded search page where Verizon gets to display advertising. (Incidentally, my ISP, Charter, does the same thing.) I...