Users are of interest here. Parents reserve the right to restrict what their children do, and perhaps more importantly but not tested here, are responsible legally for what their children do on and with the net. And parents often feel morally responsible for what children become. Users in libraries and schools deserve access to information and accountability from those who restrict access to information. Both want systems that are easy to use, and at least those being restricted would like and deserve accountability of those restricting.
Information is also of interest here.
This is less clear. Technology has made this all possible. Technology has inadvertently created a problem. Computers have become so easy that even children can use them. Information has become easy enough to make vast amounts available on the web.