I've been binge drinking since I was 18 and am now 29. I've gotten beligerent drunk every weekend over the last eleven years with the exception of a couple sober weekends each of those years. Some of my drunken "weekends" have been around 3-5 days in length. My tolerance is extremely high. It's higher now than it's ever been and I'm very seldom hungover, nothing like in the early days. I've never gotten into any trouble whatsoever due to my debauchery except for maybe hooking up with a fat chick one time, okay, maybe two times, but nevertheless I'm a responsible drunk.
I do get heartburn something terrible, though and am on prescription Prilosec. My brain doesn't function as quickly as it used to, either. I look leaner after a drunk, also. Anyhow, those are the only side effects I've noticed.
I used to be able to drink anything, take any shot, up until my 21st b-day. I did the 21 shot thing and now almost puke at the smell of certain liquors. So, to fix that I drink mixed drinks intstead of shots.
So, if you want to be a binge drinker like me, be responsible. When you drink and drive, don't get caught. And when you do a fat chick, don't let your friends catch you, but hey, fat girls need lovin', too.
The more I exercise and the more lean muscle I add my tolerance increases as well. And usually I'm never hungover.