"... buy a zip-lock bag of legal marijuana."
No, not any adult. Only adults who think federal law that isn't being enforced still counts as law and who feel bound to follow the law. And, I, for one, feel that this discrimination against us rule-followers is unfair. Why are we — of all people — the last to be free?
I am the person who — when the fences were torn down at Woodstock and the hippies were declaring "It's a free concert now" — would have respected the rights of the landowners and the concert promoters.
If something is to be legal, make it truly legal, or explain to me why there is some special reason to fence out those who still believe in order.