I know, absolutely and for a fact, that a heavy user of marijuana (remember Trayvon only had “trace” amounts of it in his system), who hasn’t been able to score for a while, can get really really cranky, and downright mean. I haven’t seen violence, but I’ve seen the mean and it’s not pretty.
Trayvon MAINLY had "purple drank" in his system, and was living a life of thuggery.
And if crankiness is the threshold of whether people get thrown into prison or banned from using things that they believe help them with illness, you've got a long, long line of things ahead of weed.
Starting with alcohol.