Yes, that's quite easy if the definition of personal life is "Sweet Jesus, sleep!"

More seriously, that's the kind of thing which does creep in to companies. They have a culture already. It's a long hours culture. You may or may not think that's a bad thing, but it's there. It's quite hard to lose as well. People come in, they can't work less than the people already there, so they jump in to it. Soon people that only work 11 hour days are regarded as slackers. Nip it in the bud. It can't work forever, and it'll get harder to change.