THE INTERNET IS FOR EVERYONE
Academically, one can argue filtering at the ISP level may constitute as a form of censorship, no? I believe communities and governments all over the world are struggling to contain the easy access to pornographic material via the net. In the light of the successes of the social media platform, it is hard to see how traditional forms of control (legislation, "education campaigns" that leans on negative messaging - "tak mau, tak nak, no", and so forth) would make a whole lot of difference.
Allow me to take parallels in narcotics and drug addiction (to a certain extent, cigarette smoking) as an example. We in the medical profession have started to move away from the Abstinence Model to a Harm Reduction Model - as the question is more of a behavioral complexity than just the availability of these substances in the "market". Of course, limiting access will help contain the rise of new addicts, but will never eliminate the problem (as demonstrated by the prohibition, there are members in the society who will exploit the steep demand-supply gradient, finding creative ways of creating supply) . This containment can only occur with a unified global participation (ie.restriction and regulation of the transport of narcotics, drug legislations and global platform for enforcement).
How best to tackle this? I do not have the answer. :(