[masraum]

I think I have when I was a kid. Once I got to be an adult and realized what a PITA it is to get out of your seat, into the restroom, do your business (in that room when you're over 6'), and then back, I decided that it was better to limit eating and drinking the day of travel so I'm less likely to need to use the facilities. I generally don't eat before flights, and then may not eat (or not more than one of the tiny bags of snacks). I also usually don't drink before or on flights, but if the flight is short, then I may have some club soda since I know I'll be able to wait until I'm in the airport to get rid of it.

Granted, flying back from Japan is usually a looooong flight (especially since the times that I've done it (as a kid)) were from Florida.