The following are prohibited:

Spamming(sending unsolicited email or posting messages to irrelevant UsetNet newsgroups that do not explicitly allow advertising, with references to a site hosted on our servers)

Sites containing pornographic material or sites which contain links to adult sites, sites encouraging illegal activity or racism, sites providing instructions of performing illegal activities.

Violations and attempted violations of system & network security. Or any type of tampering with the system with the purpose to inflict harm.