Quite right - it should theoretically be possible for a dodgy proxy to be detected if a lot of people in an area complain about access to a certain site, as you just examine which proxy would cache that site and take a good look at it. Sites subject to poor browsing are thus better to report than traceroutes, which, in th'eng's case, will make people jealous, as it goes to show that his UBR is extremely undersubscribed
