Interesting. How will they regulate shipping illegal goods? Moving people and food is fine, but this adds a layer of grey to the already blurry line uber are skirting.
FWIW, I've dealt with firearms being accidentally shipped to Canada. They were on a freight dock in Toronto before anyone realized. We (the carrier) were levied a fine and we shipped them back to the US without further incident. Being that it was self-reported, they didn't even send someone out.