First off, he's never said that. He says he wants a 16-year-old girlfriend. And no, that's not the same.
Secondly, that's the age of consent in his state, so even if he did say that, it wouldn't be illegal. So as long as he doesn't have naked pictures of her, he's not breaking any laws.
Thirdly, it's Zeni. No girl will give him the time of day, not even an ignorant high schooler, much less send him naked pictures.
So yes, Zeni is as creepy as he's ever been, but he's really just trolling along the line. And it's working on you.