Web site should link to your copyright policy. Must get permission from intellectual property owner. Privacy is becoming a hotter issue. Must decide who has access to what data and who has access to your network. Libel is defamation by writing and includes most Internet communication.
Slander is defamation by speaking and includes videoconferencing.
Everyone is considered a public figure on the web. Business Defamation falsely ascribing to a business conduct, characteristics, or a condition incompatible with the proper conduct of that business. Other issues of concern on the Internet include spamming, chain email, linking, frames, filtering and tracking. Policy should address these. Difficult to determine offensive material.