I think the honest problem was that they weren't thinking.
They saw it, they liked it and so they used it, without considering anything more than 'Ooooo shiny'.

#^^# Thanks! I have a longish Kurapica & Leorio & Senritsu friendship fic that looks like it would be great fun except for the fact that I don't know how it ends.
... the same thing happened with The Grey Series and Guard Dog, so I'm kinda hesitant to do that again...