definitely not a guy you would want to trust, but sounds more like the scam artist type than a dangerous type. The kind of guy who will swipe something when you're not looking, or something of that nature. maybe at the very worst lead you into a secluded location and pull out a knife and demand your wallet. Fortunately anybody with half a brain can avoid getting had by these guys, but they are very annoying. But who knows, maybe he was just bored and wanted some scrap metal advice.