If it was made legal and drug companies sold it, it would be held to the same FDA standards as all other drugs for purity and potency.
Believing that people would be "slipping" stuff into it is paranoia. Hmm... paranoid thinking from the pot camp... how bizarre.
lol
Decriminalizing it would be a step in the right direction- but the way drug companies are, they will push for its legalization if it came down to decriminalization. Why? Because pot is cheap and easy as shit to grow, but can be sold for whatever they damn well please. Drug companies would salivate at the chance to sell actual marijuana... their profits would be higher than their consumers.