/r/silkroad is the bottom of the barrel of SR users. I suspect a large percentage of them have never used the browser bundle. They access SR through clearnet proxies like onion.to and onion.sh, which of course means they post on /r/silkroad with their real IP addresses. The more sophisticated people might use a VPN, which offers little protection if LE really wants to find them. There appears to be very little overlap between the /r/silkroad and forum communities. Occasionally I see people over there reference the forum, but for the most part they seem to not have a clue about the conversations going on over here, or much of anything for that matter. All that being said, why are you trying to get it shut down? Who gives a fuck what they do. The information is out there on how to be safe, if they choose not to read or follow it, that's their problem.