Should half naked pictures of anime characters be marked NSFW on Lemmy?

I’m talking about this sort of thing. Like clearly I wouldn’t want someone to see that on my phone in the office or when I’m sat on a bus.

However there seems be a lot of these that aren’t filtered out by nsfw settings, when a similar picture of a woman would be, so it seems this is a deliberate feature I might not be understanding.

Discuss.