"Government actors in many countries attempted to react to the Internet
using conventional means of the state apparatus, like passing laws in
parliament or having courts judge over access to unlawful content. In
most cases this proved to be fruitless; in fact it demonstrated the
weakness of the traditional nation-state in attempts to regulate the
Internet."

"Rating systems are designed for World Wide Web sites while leaving out
other Internet-related communication systems such as chat environments,
file transfer protocol servers (ftp), Usenet discussion groups,
real-audio and real-video systems which can include live sound and image
transmissions, and finally the ubiquitous e-mail communications. These
cannot be rated with the systems that are currently available and
therefore the assumption that rating systems would make the Internet a
'safer environment' for children is wrong as WWW content represents only
a fraction of the whole of the Internet. Although it may be argued that
the World Wide Web represents the more fanciful and most rapidly growing
side of the Internet, the problems that are thought to exist on the
Internet by regulators are not specific to the World Wide Web."

https://www.osce.org/files/f/documents/2/a/13844.pdf