I believe in free speech but this concerns me. Concerned Dear Concerned, Alice is no expert, but Alice believes there are no special laws governing pornography via networks, i.e., they are the same as those governing other media. With regard to text, anything goes. However, many networks may choose not to carry some things, like hate speech. As far as Alice knows, Columbia's AcIS has made no policy on this, although Alice is researching this further.
Images are a different story.
Since you are offended by what you found on the network, you might want to send mail to the group or individual posting these stories expressing your concerns. Traditionally, the Internet has been the domain of unfettered free speech, which many believe has had tremendous benefit to individuals and specific causes. Consider that some might find Alice too blunt or one-sided. In this sense, remember all the good that comes from the same principle of free speech that protects the occasional oddball. It seems like directing your efforts to the source of the stories would be more effective than trying to create rules guiding the Internet.