Bad idea? They ought to just legalize it for everyone, and get it over with. And, no, I'm not a smoker.
It is a terrible idea because one of the chief symptoms of being high is short-term memory loss. Do you really want players being stoned before practice? I think not.
It should be legal, but people should stop lying about it being some miracle drug. It's not, and even if it was smoking is a terrible way to administer a drug.