The man is a fool, but the prank was probably worth it.
This man took it upon himself to trick a herd of hungry felines into eating what they assume is tuna. Little do the cats know, it's nothing. Just a big fat plate of juicy nothing. And those cats are not pleased at all. Welp, it was nice knowing you, guy.
"Oh we got a funny guy over here. We know where you sleep, fucker."