You kind of have to use your best judgement. If an episode is on the violent side, use the filter. If you're unsure, take your best guess, or bring the page(s) here, and someone will probably help you figure it out. It's not a HUGE deal, though, if someone kind of falls in a grey area. The staff is really good about working with artists, they won't just chuck your content if you cross a line by accident.