Which is much, much safer than driving drunk. Even then, it will be illegal drive while under the influence of marijuana. This is basically a Wont someone think of the children! type argument.
If anyone reading this is in the habit of driving around stoned, please stop before you kill or seriously injure yourself, someone important to you, or some random stranger. It's just not worth the risk.
I support legalization, but these fabrications do not help anyone. DWI should remain illegal.