As per my reminder to the forums before:
The following rule applies for threads -
1. If the thread owner asks you to leave their thread due to excessive spam or profanity you must not continue to post. If they continue to TALK ABOUT YOU, you can come back and respond to it.
In general, if your asked to leave a thread you are supposed to leave. If you feel STRONGLY about the topic, you can continue expressing your point by making your OWN thread.
for example: if someone drags a thread off topic and the OP objects, they can ask for intervention.
If someone starts writing in someone else's fan fiction and refuses to stop. The OP can ask for intervention.
The goal is to allow thread owner some control as to how they want to guide the conversation. All normal TOS rules continue to apply