I live here in Chicago and use to be a drug user, I can tell you that almost all heroin or crack sold here do come in these small self seal baggies that have symbols on them that different gangs use to identify there brand, like blue devils, green aliens, batman and so on. I always wondered where they got them and what could possible be a legal use for them, but the only thing banning the baggies will do is make it harder the user to know what brand of drug he's getting, it wont stop or prevent the sale because they usually also come wrapped in tin foil then put in the small baggy.