Well, point 3 can be eliminated by proper use of crypto. See OTR
The response to point 2 is that by having it be publicly known to everyone that messages' contents are formally mathematically provably deniable (as can be guaranteed by proper crypto implementation), that disincentivizes people from even bothering to re-post content in the first place.
Point 1, however, I agree with completely, and that's why I'm not actually advocating this solution.
You're flat-out wrong about #3. Encryption is just a mathematical algorithm, it doesn't care who uses it, only that you have the key.
In short, encryption is just a very complex function, so you feed Key + Message in, and you get an Output. f(K,M) = O
I already have access to Key and Message, so I can share both of those. The only thing you can possibly secure is f().
If you have a cryptographic program, like OTR, I can just decompile it and get f(), and then post a modified version that lets the user manually configure their key (I think this is actually tri...
New proposed censorship policy:
Any post or comment which advocates or 'asks about' violence against sufficiently identifiable real people or groups (as opposed to aliens or hypothetical people on trolley tracks) may be deleted, along with replies that also contain the info necessary to visualize violence against real people.
Reason: Talking about such violence makes that violence more probable, and makes LW look bad; and numerous message boards across the Earth censor discussion of various subtypes of proposed criminal activity without anything bad happening to them.
More generally: Posts or comments advocating or 'asking about' violation of laws that are actually enforced against middle-class people (e.g., kidnapping, not anti-marijuana laws) may at the admins' option be censored on the grounds that it makes LW look bad and that anyone talking about a proposed crime on the Internet fails forever as a criminal (i.e., even if a proposed conspiratorial crime were in fact good, there would still be net negative expected utility from talking about it on the Internet; if it's a bad idea, promoting it conceptually by discussing it is also a bad idea; therefore and in full generality this is a low-value form of discussion).
This is not a poll, but I am asking in advance if anyone has non-obvious consequences they want to point out or policy considerations they would like to raise. In other words, the form of this discussion is not 'Do you like this?' - you probably have a different cost function from people who are held responsible for how LW looks as a whole - but rather, 'Are there any predictable consequences we didn't think of that you would like to point out, and possibly bet on with us if there's a good way to settle the bet?'
Yes, a post of this type was just recently made. I will not link to it, since this censorship policy implies that it will shortly be deleted, and reproducing the info necessary to say who was hypothetically targeted and why would be against the policy.