What The Beave said. Additionally, less offences means less police required to police crime which means less taxation. That's why I think it ridiculous that smoking weed or even taking party pills is a crime, even though I don't do drugs.
Discussion
I mostly agree, though do you worry that legalization leads to normalization? Will we see more pill-heads and is that a bad thing?
We'd probably see less if you brought them like alcohol in the shops. I'm not really sure. Again, legalising them and making them in a lab could be safer than allowing the black market to handle it too.
I agree, legalizing it might actually take away some of its shine. In any event, it's safer for everyone and takes away gang profits, it can't be that bad.