Censoring a medium is an instance of censoring the idea, and if censoring one particular medium is permissible, then any number of media may be therefore censored.
>This doesn't follow from my argument that censoring one particular medium is OK.
It does, since by your own admission, censoring a particular medium does not entail censoring the idea.
>Child porn is a genuine special case (direct harm in its production, lack of consent in dissemination)
So this is what I was getting at - you say it's fine to censor a particular way of conveying an idea due to other harms being associated with that particular way of conveying. In child pornography it's the violation of consent in its production and violation of privacy in its reproduction. Extending this argument from child pornography to regular pornography, some would say there are significant harms involved there too (e.g it conveys the idea that women ought to be subservient to men), and then to hate speech.
The core idea is that speech is not absolute, just like actions aren't absolute. You're free to swing your fist so long as it doesn't hurt anyone, and you're free to say things so long as they don't hurt anyone (or require anyone to be hurt, of course). This means that with a sufficiently convincing empirical dataset, we can outlaw regular pornography and hate speech.
>This doesn't follow from my argument that censoring one particular medium is OK.
It does, since by your own admission, censoring a particular medium does not entail censoring the idea.
>Child porn is a genuine special case (direct harm in its production, lack of consent in dissemination)
So this is what I was getting at - you say it's fine to censor a particular way of conveying an idea due to other harms being associated with that particular way of conveying. In child pornography it's the violation of consent in its production and violation of privacy in its reproduction. Extending this argument from child pornography to regular pornography, some would say there are significant harms involved there too (e.g it conveys the idea that women ought to be subservient to men), and then to hate speech.
The core idea is that speech is not absolute, just like actions aren't absolute. You're free to swing your fist so long as it doesn't hurt anyone, and you're free to say things so long as they don't hurt anyone (or require anyone to be hurt, of course). This means that with a sufficiently convincing empirical dataset, we can outlaw regular pornography and hate speech.