Ninjas like lurking in the dark.
Ninjas like to floof quietly.
Generally speaking, yes, I do get curious, although I think it's nice that there is no emphasis on indentifying the people who gave the floof, as that would perhaps slightly alter the point of it existing at all. When one sees who recognizes him, he in turn recognizes that person. Potential stirs for a scratch-my-back-I'll-scratch-yours cycle. Subsequently, it becomes less about the person receiving the floof and giving kudos to his behavior and more about establishing rapport and generating attention.