I'm having trouble with this "be more evil" thing (which would surprise my family, let me tell you). Suggestions are welcome.
I've rejected "Slush Puppies" as just too cute. I have similar, but less strong, feelings about "Anonymice"; also my readers don't seem terribly mouse-like to me. Still, there's a proud tradition of mice in children's lit. Do you see a mouse?
"Slushies" reminds me for some reason of Thugees, that evil cult in Indiana Jones and the Temple of Doom. I disliked the movie, but I like the evil cult thing.
"Anonymati" does seem like a secret society, which has debatable application here. Unless it's an evil secret society? At the same time, I like "Anonymati" (as well as "Slushies" and "Peons") for clarity: a brand-new reader will have at least a fighting chance of figuring out that I'm addressing my readers when I use it. Not so much with "Mice", "Ablatives", "Queries", or "Snarfles".
But maybe we don't care. It could be like hazing, which is at least a little bit evil, right? Ugh, who can think with this evil cold? You guys decide. I'm going to go have an evil nap.