First of all your analogy fails, as do most nazi references by the uninformed masses. Second, as someone in charge of another big(ger) message board system, we have to cover our asses about things like this. If someone from here were to go out and kill someone using methods they found here it's rather easy to drag the owner of the site into the trial, etc.
There is no freedom of speech on internet message boards. You sign that away when you agree to all that stuff that you probably don't read when you click the "I Agree" to make your account. If you don't like it, tough shit.