[anonymous]

Well, what happens when someone makes a bomb threat from a public payphone? It's basically the same situation. There's no clear cut way the police should continue their investigations at that point. Still, people making bomb threads are getting arrested, and people transferring illegal data are getting arrested too. Most of the time because they messed up at some point. Outlawing Tor (or payphones) would maybe stop a few of the few individuals that slip through law enforcement's net, but there are still other means for them and each round of legislation yields diminished returns.