That is a choice of society. On one side, an anonymous network with freedom
of speech, information and, in the end, thought. On the other side, a society
monitored by the state, i.e., a dictatorship that decides what are the topics
you cannot talk about (today child pornography, Nazism and Salafi, tomorrow
communism?, after tomorrow anti-state ideas?). I made my choice.
Of course you can use your freedom of speech to publish objectionable
material.. but I would really like to see a study showing that there is more
child abuse or racist/anti-homosexual/etc. crimes - the real problems - if
the citizens have access to child pornography or fascist propaganda. I really
doubt it is the case. People masturbating watching children do not harm any
child doing so. Without that to satisfy their impulsions, they may more
easily act and waste children's lives. Same thing when criminalizing the mere
expression of extremist ideas (the first and valid argument of extremist
parties: the state prevents the citizens from being informed and make their
own opinions on what they "defend").
Citizens are not chidren. The state should not be a father (any resemblance
to Staline is not a mere coincidence).