Glad to see there aren't too many judgmental people here.
Agree with the above poster - there is a WIDE range of intoxication between sober and plastered. Likewise, it is probably a sliding scale as to what kinds of behavior are tolerable for different people. What I'd tolerate now, either just with my wife, or with our teenagers in tow, is much different than what I'd have exposed my kids to when they were little.
Drinking around the world is one of my favorite things @ Epcot. And at F&W, not surprisingly, it is a little more amplified, not only in the numbers of people, but in the amounts they drink.
I think it is well known, and if Disney wasn't making enough of a wad of cash off of the event to offset any negatives that occur, they'd change it or eliminate it.
I've never seen anyone fighting/passed out/puking, but that isn't to say it doesn't happen. I am sure it does, but it is probably somewhat isolated.
If you don't want to be around it - visit another park or schedule your Epcot trips at a different time of year.
It's a lot like Pop Warner week, Cheer competition times, Gay days, etc. There are several times of year when there are events/groups there that might not be a good fit for some. Heck, from what I've seen, the Star Wars Weekends @ DHS are something I'd want to avoid. I'm just not into Star Wars, and it takes over most of that park at that time.
WDW can't be all things to all people 365 days a year. But I think we can all agree that for the most part we love the place.
