A propos free speech in the US.. the Child Pornography Prevention Act was overturned in a 2002 Supreme Court Decision Ashcroft vs Free Speech Coaltion. I don't really know if forbidding someone to create virtual child pornography or comics that depict child pornography is really a bad thing but it did violate the "artists" free speech because it was overbroad, according to the decision anyway.
The problem with such laws is that you give rights to a drawing. By the same token you could then say that any drawing of an underaged person doing drugs, being shot, etc is a similar violation of their "rights" (the drawing) and should curry a similar punishment.
The PROPER way to go about it is to say that drawing sex between an adult and a child is a crime not because it violates the rights of the fictional being, but because the person drawing it is promoting pedophilia. The problem with THAT is that it goes into thought control and or free speech.
However, NONE of those have ANYTHING to do with a government that tries to build a great firewall to control the content that comes in. Remember, in australia the banned site list already includes "sites that oppose the firewall" and "sites that are pro life". (apparently that is hate speech)
You said that there is no police unit whose job is to track child pornography and have it deleted. Why the hell not? it is certainly a more sensible approach then creating a national censorship infrastructure. (And doesn't reduce your browsing speed by 80%).
BTW, doesn't this already exist? I distinctly recall CP specialized police offers being diverted into a special force to track IP violators some years back.
They argue that a floodgate would be opened if a ban on content is allowed for anything - today its child pornography and whoops tomorrow free blogging would be all but impossible
This is EXACTLY what happened in australia. They are pushing the great firewall of australia to stop child porn, but already the ban list includes criticism of the government and certain political ideals (pro life). And they actually tried to deny blogs freedom of speech because some higher ups were offended at the "lies" said blogs said about them. There was a public outrage and it was overturned though. for now.
I may be wrong, but I believe in Japan it is illegal to show genitalia in popular anime and manga, these are drawn or rendered materials.
Japan tried to stop porno altogether, they have never specifically targetted underaged porn.
Until very recently the age of consent was 13 (but it was recently raised to 18). Anyways, they tried to stop ALL porn by banning the show of "pubic hair". This resulted in immediately everyone being shaved, they responded by saying you cannot show a penis entering a vagina, which was responded to with tentacle porn; have a monster insert phallic tentacles into a vagina (it existed earlier, but it exploded during the period of the ban). Nowadays they relented and are content to simply require blurring of genatelia.
Anyways, japan is still the worlds #1 producer of pedophilia cartoon pornography. and they don't seem to have any laws against it.
I support laws against child porn, but those laws should actually target child pornography. Shutting down servers, removing content, and the like.
Laws creating a national firewall are designed to create a police state while using children as an excuse.