If that were all the slacker spice did, you'd have a good point there.
I agree, I think it should be legalized. It would create a new market and at the same time drain the money of the Afgan warlords (that fund terror organizations by growing it and smuggling it into the US.) In my experience it's non habit forming, I usually go 4-6 months between using it. Also I don't recall ever hearing of someone getting so high and causing car accidents. And I've never heard the excuse "Yeah I had sex with that ugly fat guy/girl because I got too high."
Compared with...
booze
hydrogenated fats
cigarettes
daytime TV
...where would you put the ill effects of Demon Weed?