Perhaps reverse image search should notify of similar images, or more importantly, specific DNP images, which aren’t covered by the DNP list.
You’re one of the ones that wants the tag. I suggest you set up a thread or something and find other people that do as well.
I like this new policy of editing the stupid out of comments with an explanation of what particular brand of stupidity got edited; this way is much less disruptive than THIS COMMENT WAS DELETED BECAUSE THE USER WAS A GOBSHITE NOW EVERYONE WONDER ALOUD ABOUT THE MISSING CONTENT in screaming red text.
Derpibooru costs over $25 a day to operate - help support us financially!