I've known about it for quite a while, but never tried it until this afternoon.
eurionize
works :-). I eurionized a printout of the "Works on My Machine" badge, and lo, the colour photocopier at work declares it to be "illegal content" and refuses to copy it, just like it refuses to copy a ã10 note.
Maybe I should start issuing currency. Mine couldn't be any less credible than the existing world currencies...