I AM THE GREAT NECROPOSTING WIZARD!
RISE FROM YOUR GRAVES!
Just thought I'd come here as I was wondering the same thing. Seems OP hasn't been banned, huh?
Now to spam random screenshots of custom stuff to miiverse!
OK I figured now I've necroposted, I might as well contribute something actually vaguely noteworthy.
I have seen people discussing stuff like custom home menu music and things without a bat of an eye from mods. Yeah, miiverse doesn't care as long as it isn't XXX nude samus hd version or something