I know this is annoying, but I absolutely hate predrafting. For all you know, this guy is spending his time crunching stats, consulting fantasy sharks, and reading up on the most current info there is. I know, it's more likely that he just doesn't care about the time he is wasting for the rest of you. But he isn't breaking any rules.
I do like the idea of making the wraparound a single timer. That way, if the guy hits 12 hours, he loses both picks.