It is easy for students to be exposed to huge amounts of deleterious content on the Internet. Web pages can, and often do, contain pornography, violence, terrorism, gambling, and child abuse, which have a negative impact on children's development. Although installing filtering software cannot guarantee filtering all unwanted websites, it can nevertheless limit children's access to most unhealthly content.

In Hong Kong, it is illegal to publicly display any obscene and indecent materials. To report an exposure to obscene materials in public, you can make a report to the Hong Kong Internet Service Providers Association (HKISPA). HKISPA is commissioned by Television and Entertainment Licensing Authority (TELA) to handle all complaints related to the "Control of Obscene and Indecent Articles Ordinance (COIAO)". COIAO oversees newspapers, magazines, publications, comics, Internet content, and unclassified movies, videos and CDs.