What do you think about a person who strips naked in the middle of a busy area and pees in public? Should they be allowed to do whatever they want if they're not in someone else's private property?

Doing drugs not only affects their immediate family, it affects the whole community, and a lot of drugs cause the air to stink for hours, as I've mentioned in an earlier post. Even if it didn't affect others I'd still think it's wrong, but to call it interfering with people's lives is quite simply ad hominem and red herring at the same time.