Pretty much what DinohScene said.
The off-topic is more for threads that fit other sections, but aren't really jokey. Pretty much this thread. It's just off-topic, but meant to be a serious conversation and or question.
The EoF is meant for testing features, spam, and jokes. So pretty much threads made for laughs.
To not get banned, just generally follow the rules, treat others with respect, ect. Pretty much use common sense and you should be fine.