Is there a conspiracy to defame alternative medicine?

Yes, very true indeed. The reason 'skeppies' are blocked is because they have a tendency to generally trash other people's views without a good reason except to start an argument (or because they have another agenda altogether which revolves around their own self-interests). They do not approach questions from a balanced perspective even in the light of evidence which suggests to me that they are not in fact scientists - they are insecure people at best playing a game of 'one-up manship' with other people who have the stupidity to acknowledge them in the first place. Their behaviour proves they should have no place on this forum. The best policy is to ignore them.