If there's no rules then there should be no purnishment, the forum here has rules and regulations that help put things into order and cordination, else people can't hesitate on changing the main motive if bitcointalk to another thing else, if you plagiarize, you will get banned or act in a way that's against the normal expectations of the he forum, but to stay safe from this, just take your time in reading the forum's rules and regulations and behave well then you're free of unnecessary fear of getting banned, noted this that behind every ban is a reason that led to the act.