I have learned in my life to never get between those who crochet and their crochet hooks. Those folks are passionate about yarn, and they don't care who knows. And there's nothing wrong with that!
But boy howdy do you ever see some odd things done with a simple pair of crochet hooks. Usually it's something awesome, like tiny adorable animals or maybe a sweet pizza blanket.
I'm not so sure about these socks for flip flops, however.