For those who advocate legalization on practical grounds, NOT constitutional grounds, what outcome of legalization would constitute a failure in your book?
Can't think of too many. Colorado already has pot decriminalized to where possession of an ounce or less is a summary offense, and we haven't seen an outbreak there of crazed potheads committing armed robberies of junk food from 7-11s as some have claimed would be inevitable.
Seriously, I smoked the crap when I was younger. And did beer. Still drink beer. Don't smoke pot any longer. My experience with both is that some people can handle alcohol, some can't. Some people can handle pot, some can't. There will be problems with people in the latter categories. But the number of people in the latter category when it comes to pot who also present a clear and present danger to society is far smaller than with booze.
So it's stupid to make pot possession criminal. It's a waste of law enforcement resources and prison cells. Best to decriminalize it but still allow some law enforcement levers for the few people that do become social problems from abuse of weed.