Demon was right on. In Britain, one must prove that one's statement was not libelous if one is challenged in court, which is really quite difficult, as proving a negative is very difficult. Thus, ISPs are forced to take the policy of "Anything in doubt must be censored (removed)." Certainly the ISPs (who are probably annoyed at this as much as we are) are not playing games, as the Gagging the Internet in Three Easy Steps article shows.