Students need to learn how to properly cite resources that they intend to use as part of their own work and must learn to assess and question the authenticity of the information they acquire. Because the first amendment of the constitution guarantees rights for free speech, we have the problem of pornographic material on the Internet. Even worse, is the reality that hate literature and extremist information from sources of every description are indeed accessible on the Internet. Strategies for dealing with these issues vary, but are well documented in many locations. Student use of email and posting student's web pages raises issues of child safety and privacy.
Schools require signed waivers from students and parents to protect against liability issues.
Typically, simple supervision and candid discussion with students regarding these issues will minimize the risk of difficulties.