acid in the 50's and 60's was used as a truth sirum, people would have bad trips and tell the negotiater everything, but the scientists realized people became more independent and would think for themselves, thats what scares the government the most. My buddy got caught with a bible of acid{100,000 hits} and each hit was considered manslaughter, he is suppost to be in jail rite now, but he had a good lawyer. I have tried acid before and it opens ur mind to government conspiracies, and just how the world works. i think its illegal because the government knows the ppl would revolt if they all took acid, there would be nothing for them to do except watch the world get even more corrupt.