...an assault rifle stuffed with heroin.
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.