Depends on how people define child.
Until 1990, the marrying age for women in my country was 14.
They raised the marrying age to 18.
Now there are clamors to raise the marrying age to 24.
So the definition of a child gets re-defined each year in each country.
And if we are to ban what people define as child porn, let's just ban all of porn all together... then we go to what defines porn.
I remembering emailing my sister in the USA naked pictures of my children 1,2 and 4 years old then. And she explains that in the USA naked pictures of children are considered porn...
My point is, until one world government comes along, how can we ever get to synchronize laws and regulations?
In the US, thirteen-year-olds can get married with parental consent. This usually only happens if one of the children becomes pregnant. They can reproduce, marry, but still not be allowed to participate in pornography. They cannot obtain a driver's license, drink, join the military, and still must have to attend school.
It will be a long time before there is one world government. That's why there is a need for limited censorship.
I don't think your sister would be arrested for having those pictures, as they are family pics, with no child porn in her possession, but if they were to end up elsewhere on the Internet, on a kiddie porn site, you'd probably be angry as hell. Someone could have intercepted those pics in transit. This is just an unlikely supposition. I'm not that paranoid. Just stating what could be.
My opinion is that banning porn altogether wouldn't really hurt the Internet. Sure, anonymity helps in buying/viewing porn, but would everyone give up the Internet without it? I think not. "Darn! Porn is gone. I'm not going to look for anything else that I'm interested in."
I'm only using your post as an example. It's actually to all participants.