I agree that a set limit is inappropriate, and I get sloshed as the first drink is set down on my tray!

More appropriate, methinks are (as pointed out above) common sense serving techniques by the FA's. I know how difficult that can be since each pax (depending on the aircraft and the cabin) might be served by a few different FA's through a flight. But, I've been on flights where someone who had clearly had enough was practically hooked up to a liquor IV to the galley anyway.

It also seems to me a few of the air rage incidents I've read about involved empty bottles. THAT should be a primary issue-- pax who serve themselves!

I'm afraid I don't have a solution for that one. I know I couldn't handle an FA's job for more than one short flight.