I often watch "Cops" and shows like that. What always gets me is when they pull over cars coming from a "known drug house", then arrest the passengers. If they

I often watch "Cops" and shows like that. What always gets me is when they pull over cars coming from a "known drug house", then arrest the passengers. If they know it's a drug house, then why not shut it down instead of arresting an endless stream of customers? It just feeds my inner (morbidly obese) cynic. I have a sneaking suspicion that these drug laws are about more than preventing harm.