I think people want to do things they are not allowed to. They will go through the effort to find a way. In a lot of states that legalized Marijuana, its use went down after legalization. Once it was normalized, some people lost interest. I think the opposite happens when you make it illegal, you're basically making it cool again. This isn't just drug use, it's with a lot of things, if you forbid it, people will suddenly want that thing more than they did before. Religion comes to mind. Authoritarian countries that want to stamp out a religion or all religion often cause a religious resurgence. There's nothing quite like being told you can't do something to make you want to do it or visa versa. People are naturally oppositional.