Do you think it depends on what mod is processing the anon posts, or what group, idol or fandom you post about?
Or were there other reasons that made your post get discarded (like profanity, too sexual, too political/religious, too shocking)? And did it give you a sense of the line of what could just get through, what could just not get through - or was it too mod dependent?
Don't set me up with the religious part!!! I'm openly an orthobro