It is regulated in public places. I believe most states only allow it in the privacy of your home. I certainly don’t recommend pot but it is no worse for society than alcohol. If someone wants to drink, smoke pot in their home or ride a motorcycle with no helmet it should be no business of mine or the state.
In Colorado, at least, smoking in public is a ticket-able offense. There are private establishments where people can ingest/smoke together. I’m fine with that.