I'm torn on issues like this.
I agree with Snaf that Government has no right to dictate what I can and cannot put into my body.
We, as a society, have proven over and over and over that we cannot control ourselves when it comes to "chemicals" like this- and innocent people get hurt. Drunk drivers kill people. Illegal drugs ruin families. We, again, as a society, cannot handle this responsibly , and we have shown it over and over.
As far as I am concerned: do what ever you want in your own home. But when your right to 'get high' infringes on my right to life, I start to take some serious issue.