Follow state or country laws. This means no content relating to sale/trafficking of drugs or child exploitation.
I do not care personally for doxxing but it is banned here solely so I am not liable.
Spam and flooding will be caught by the system and you will be banned for it.
Do not impersonate mods or admins.
File sharing and torrents are fine, but intentionally sharing computer worms/malware is forbidden.
In general, practice OPSEC.