I don't think selling drugs on the forum should be publicly endorsed, but what someone does behind closed doors, is not anyone's business. They should be able to post a thread offering to sell whatever they want, but behind closed doors, prices or proof shouldn't be posted publicly. There is no harm done in that. Arms and drugs are just another trade of the business world. Should be allowed, just not allowed in the open and publicly, where everyone is able to see. Think about this. What good is freedom of trade, when you can't sell what you want?
Not to mention, I'm sure LE will be more interested in selling of skimmers and dumps and whatnot, then some maryj which anyone can obtain these days on the corner.
