In ...The Online Edge: Persistent Problems of Porn - Offensive online content assaults school users through multiple channels, Odvard Egil Dyrli does a great job of describing the issue of "porn-napping" and disguised inappropriate e-mail links.
This information may be an eye-opener for some. It is worth reading (as is most of the content on Districtadministration.com).
Although I am typically suspicious of schemes that "over-filter" content, I must admit that Gil is correct to highlight this growing problem and the negative effect it has on web use at schools (and home).
What do you think of this issue? Have you had a negative experience with this issue at your school?