Students Use of the Internet

I recently read another chapter from Aimee M. Bissonette's book Cyber Law: Maximizing Safety and Minimizing Risk in Classrooms.  This chapter talked about how students use the internet and it focused a lot on the ways that schools can be implicated in a students negative use of the internet and technology.  One of the issues that was talked about a lot during this chapter was the right of free speech.  Free Speech is one of those issues that easier for the schools to combat when something happens on school grounds, but outside of school grounds it seems like a loophole for people to not be held accountable for their actions.  Even in the past 30 years technology has drastically shifted and a lot of our communication is done in a non-verbal manner and that can be just as disruptive, if not even more, to the students in the classroom and to the people who are affected by the things that are posted and said over the internet.
One way for schools to protect themselves from issues such as this is by creating a policy that provides coverage for incidents or that limits the access which students have to various social medias.  But how is a school supposed to be responsible for actions that happen off-campus?  If a student posts something while off of school grounds that is disruptive to the learning process then they can still be dealt with in the same fashion, but it is harder to control.  I think more than what the schools can control it is also just as much the responsibility of the parents to make sure that their students are appropriately using the technology that they have been given and that they don't abuse the freedom that comes with internet access.  Schools have a big job and it is hard for them to do everything without outside support.