Respect should be number one thing that is respected online. As a coach of three different sports I am sickened by how grown adults treat others online in regards to a game. Whether it is the name calling, verbal abuse, racist comments, or threatening violence individuals have no respect for others when they are typing on a screen.
The number one thing I believe should be the main responsibility is no cyberbullying. It is an extension of what I talked about with rights, however I think of all the high school students that I have worked with that have experienced cyberbullying.