Perhaps where you live. Public intoxication - within reasonable limits - absolutely legal here, and no one would accept or even propose something else.

Being high on most drugs is actually not illegal in most places, owning, selling or consuming them is.

I appreciate that you try to help people, but you should preface this with where you are based, else this advice is kinda useless for most people, because it may very well be simply untrue for them. This is only true for a few extremely authorial places. If you live in a liberal democratic system it is almost certainly legal for you to be high or drunk in public, if you do not cause trouble. And don't collapse on the sidewalk or something.