Allowing sex and pornography on the Internet in academic spheres or anywhere else is controversial. One reason why this is so controversial is because people's definitions of pornography and sex are different. What one person might consider pornographic, another might consider art.
Different people have different viewpoints about sex and pornography.
This is why it is so hard to censor. The government is stuck defining what is pornographic, what is art, what is offensive, and what is not. Until a global, or at least national consensus can be reached about what is pornography and what is not, censorship of the Internet is impossible. There are censorship issues everywhere dealing with pornography and sex on the Internet. Bills are being proposed in Congress right now to censor pornography and sex on the Internet.