Nasty Girl
This map doesn't have an epilepsy warning because it looks bad. It was instead added in via storyboard, which is completely acceptable in my eyes. Can there be a silent epilepsy tag that lets a beatmap be marked for epilepsy, but not show the epilepsy warning?
This can be as simple as "EpilepsyWarning: 2" instead of "EpilepsyWarning: 1". Much like other beatmap level toggles which aren't documented anywhere, this can be undocumented and only for people who know about it. So long as the bats and many top modders know of its existence, it will eventually become common knowledge.