"Hicks-Jones" apparently got lazy about wearing his blue-eye contacts. Maybe it was all too easy for him or maybe subconsciously he wanted to get caught?

He even sang "Behind Blue Eyes" - Sort of daring the audience to catch on, mocking them. That's a Joker-ish / Riddler type act - if you compare his behavior to dramatic characters from the theater.

But the characters are based upon things which happen in real life! And putting the inside joke in people's face is something "The Riddler"/ Joker's villains would do.