Why is that a good idea? Is drug tourism necessarily a bad thing?
Also problematic is the fact that in a lot of countries everything is outlawed so they might go looking for hard drugs where soft drugs are being sold. I've seen enough tourists seen thrown(1) out of a coffeeshop for asking any kind of hard drugs. What they don't find in coffeeshops they do find with street dealers.
(1) yes, flying
LSD is often liquid before being deposited on a stamp.
Molecules are what matters, not the structure or state, and alcohol (like tobacco) is effectively a drug.
This is not to say I think alcohol should be banned or more strongly controlled, but rather that we should really rethink how we harshly we view things like cannabis
The only point of comparison I have is amsterdam and people are definitely flying/road tripping there for short "drug vacations" (I genuinely think everyone I know has been there at least once for that purpose), which in my book is not so good for the environment and a more than debatable reason to fly/drive hundreds of kms.