For those that want LSD but not have to be a criminal I recommend trying 1-P LSD which has the functional class of LSD without being illegal in most countries, happy tripping. If you're on the wall about trying it micro dose and work your way up to something functional.
Is LSD schedule I in the US? If so it might be prosecutable under the federal analogue act, although whether that act matters seems to be somewhat debated. I know some other countries have blanket bans on RCs and analogues as well.
Yes. Most psychedelics are Schedule I. Though to be fair, that's in large part due to the UN Convention on Psychotropic Substances, of which only 11 UN member states are not party.