For hosting accounts, there are keywords and other criteria we report on in order to prevent abuse. We explicitly don't say what they are for security reasons.
For the forum, prohibited discussion would include illegal activity (e.g. how to set up phishing websites or pirate software), content that is offensive, incites violence, or is otherwise in poor taste (e.g. racism, advocating violence against someone or some group, etc.), porn or other adult content, and profanity.