You don't know how long the next guy's been awake, what time zones he's crossed, whether it feels like early morning or happy hour to him... and even if you did know, what business is it of yours? If I'm flying in the morning and not working that day, you bet I want a few bloody marys or screwdrivers to go with my Cheerios. If there are any. Whether I've been up the prior 24 hours (sometimes it happens) or not.