Methods by which to control activities are likely implemented more easily through personal controls, in the case of parents wanting to monitor what their children are participating in while online. News coverage that highlights the negative effect of a new technology would assist in curtailing the illicit activity. Some people would refrain simply because of their own moral compass. Others would perhaps in conversation with people they know express their distaste for the activity which would discourage their contacts from participating. Internet service providers could implement some control if they deemed some activity to be in contradiction to the user agreement agreed to when a person signs up for internet access. Public service announcements in print, video media, radio broadcasts and any other medium would help get the word out that the activity was undesirable. This may help keep the activity from becoming popular.

Ultimately, undesirable activities become controlled with laws. I think it is important to be deliberate in the development of new laws. Too rapid of implementation could lead to laws that are too loose in definition and allow misuse by government agents.

Here is an article with illustration of how a law can be expanded beyond its original intent.

→ http://www.heritage.org/research/reports/2013/06/reasonably-construing-the-computer-fraud-and-abuse-act-to-avoid-overcriminalization

Note that this law would allow for the prosecution of a person for using an unsecured wi-fi signal that it not their own.

The ideal solution of course would be to mold all children into people who respect each other, the environment, etc such that they would not partake in activities that are questionable.