I'm not sure what RomeoStevens meant about discussion of violence against oneself being illegal, but aside from that aspect, his point is entirely valid. You seem to be suggesting that we're generalising from "suicide is illegal" to "any form of violence against oneself is illegal". We're not. We're simply noting that suicide is one type of violence against onself, and it's illegal.
Your statement expands to "In most times and places throughout history, including all countries whose legal systems I am familiar with, violence against oneself is fully legal." Unless you're familiar only with very odd legal systems, that seems to be a rather blatant confusion.
but aside from that aspect, his point is entirely valid
No. MixedNut's point. RomeoStevens' reply was confused and mistaken. Unfortunately Caspian has mislead you about the context.
We're simply noting that suicide is one type of violence against onself, and it's illegal.
That was my original impression and why I refrained from downvoting him. Until, that is, it became apparent that he and some readers (evidently yourself included) believe that his statement of trivia in some way undermines the point made by MixedNut's and supported by myself or suppor...
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.