The fact that you may have the technical ability to do so, or that the other person may not have properly safeguarded his or her account, does not mean that you have authorization. Unlike with libel, a statement can be an invasion of privacy even if it is true. These laws also apply equally to the Internet, and a number of people have been prosecuted and convicted for violating them in that context. That makes it particularly difficult to determine whether materials on the Internet are obscene, since such materials are, in a sense, everywhere, and it is therefore not enough that the materials are legal wherever you are. In one case, the operators of a bulletin board service in California posted materials that were not considered obscene there, but were convicted of violating the obscenity statutes in Tennessee when the materials were downloaded there.
Child pornography is the visual depiction of minors engaged in sexually explicit activity.
Unlike obscenity, child pornography is illegal regardless of whether it has any literary, artistic, political, or other socially redeeming value. Sexually oriented materials that do not constitute either obscenity or child pornography generally are legal. Still, it is illegal in most cases to provide such materials to minors, and displaying or sending such materials to people who do not wish to see them may be a violation of the university's Sexual Harassment Policy. Engaging in such activities can also make you liable for monetary damages to any person who is harmed by your activities. Again, the fact that you may have the technical ability to do any of these things, or that another computer owner may not have properly safeguarded his or her computer, does not mean that you have authorization.