Obviously almost everybody here uses hidden services to get drugs. Some people use them for other things, like secure email. It depends on what the hidden service offers. Asking on a drug forum will give you a biased sample of Tor users. More generally, hidden services are useful because they are very censorship resistant. An onion domain can't be hijacked by a registrar like we saw with some piracy web sites. An onion domain is the first 16 characters of a base32 encoded hash of a private key. A hidden service identifies itself to a Tor client with that private key, so the only way to hijack a hidden service is to 1) hack the server and steal the private key, 2) brute force a private key with the same hashed / encoded first 16 characters (a hash collision), 3a) trick people into believing your domain is the domain they desire, or 3b) brute force a private key where a substring of the onion domain resembles a known hidden service, which we've seen with some phishing attempts. 3a,b) are possible because of Zooko's triangle. https://en.wikipedia.org/wiki/Zooko%27s_triangle Great idea. There's already a library of academic material on anonymity networks. http://freehaven.net/anonbib/ Why? Because security through obscurity is a myth. The more we know about the technology we use, including threats to that technology, the safer we are. It's a decentralized network, supported by thousands of independent volunteers, spread across ~75 countries. Even if funding to the Tor Project were cut off, the relays would keep running. Eventually bitrot might down the network, but it would take years. As for "darknets" in general, there's an obvious need for privacy-enhancing technology, especially with an increased awareness of state surveillance capabilities. Beyond that, people increasingly understand the liberating value of this and other technologies (cognitively, financially, and otherwise). Take bitcoin as an example. When governments don't control the money supply, an American can safely do business with a Cuban or Iranian. Let's say you're a publishing platform, like Wordpress. You need to make money as a business to survive, and an Iranian dissident is willing to pay for your service, but he can't because of embargoes between your two governments. This is where superficially well-meaning policies go wrong, but transactions in the bitcoin network are subject to no global policies, except the math that protects the integrity of bitcoin transactions. The coins in your wallet are yours, like actually yours, not just a(n easily revoked) "guarantee" from your government or a bank. The cat is out of the bag on "darknets" and other privacy-enhancing technologies. A growing number of people understand the value of these technologies and there's no turning back, so no they won't go away, even if Tor isn't the final answer on secure anonymity networks. I'd like to know if your colleagues in the CS department can identify a random hidden service of my choosing.