Er.. This, again...   I think the media liks using the most outrageous examples in an attempt to drive pageviews/ratings.  I highly doubt that a heroin-stuffed assault rifle will ever be sold for bitcoin in any other context than "See! I told you it could be done!".  Both of those items are logistically better handled separately.

And anyways, I would much rather that money go to supporting small businesses and charities, and I am fairly certain I am not alone in that.  I just don't see a purpose to recreational drug (ab)use.