Let's see, where shall I start?

It deadens the senses, slows the reflexes, lessens the abillity to feel pain (very important safety factor), keeps the mind from focusing, destroys brain cells, contains carcinigins...

Nope, can't think of a good thing about it, but I have known people to get killed or seriously injured because of mental impairment while on the drug.

Legalize it? I think not.