I fear it’s going to be limited by Lemmy’s naïve interpretation of NSFW (only equating it with porn), so many people who haven’t changed the ‘Show NSFW’ checkbox off from the default won’t see any of the posts.

If Lemmy’s spoiler tags were more widely supported, I’d suggest an alternative of posting inline images in the body of post, hid by spoiler tags, but they’re not, so I won’t.