Well for starters you will be able to operate a darknet market outside of tor.
So you have just brought the mainstream internet users closer to a darknet market.
Cryptocurrency of choice would be LSK and it is basically a decentralized network.
The gov't officials would not be able to stop them.
The value would increase because of the awareness just like how the silk road brought many to bitcoin in 2013 & 2014.
The more bapps/dapps on the Lisk sidechains then more ways to obscure LSK transactions.
This is a very interesting concept. Lisk would then prove to become very useful for developing not only decentralized apps (using JavaScript) but also, the ability to operate a darknet market within its blockchain. Imagine a darknet running on a blockchain, in which it will remain online as long as there is at least 1 node to keep the network alive. (in this case it is Lisk) It is a good thing to see the official launch for it, and I hope that it will become one of the top platform used by JavaScript developers worldwide.

Does anyone believe that they have the JavaScript skills to develop this?
Btw look what I found:
https://www.reddit.com/r/DarkNetMarkets/comments/4lufc6/can_you_build_a_darknet_market_on_a_lisk_sidechain/sorry to say but i doubt this is possible to be done securely , It would literally take a police force or government to take over the node and locate the node and it would have literally all the information of everyone that uses it , It's not like Tor with no exit nodes, and even Tor has apparently been broken into on occasion.
Anyone being the sidechain delegate supporting the node would be very easy to locate to begin with , but would also be charged with crimes themselves not to mention the treasure trove of peoples details that would be incredibly easy to get off the delegate node once its been located
As long as the nodes hosting a bapp/dapp are in a country where a darknet market is being hosted isn't illegal then it is just fine. Thanks goodness there are over 200 countries on this planet. For example Nigeria doesn't give a damn about any darknet markets much less cryptocurrencies.
Do you know anything about the silkroad take down? it was an extremely hard to find server that took attacking the whole tor network to find the hosting website.
Anyone could take 5 minutes and know exactly who and where it is being hosted from . How are you preventing it from being found?
If its found then it will be located extremely easily , they could literally just snoop on it without taking it down and be fed all the information of every single user using the service , they would't even need to reveal where they got their info just wait for the guilty party to get caught in the act and then respond