Let me just say at first that the way the Germans are handling this boggles my mind, and has always done so, ever since I came here.
Doesn't that become kind of antisocial?
Well, it does sometimes, but then again it's not that hard to overdo anything.

Me in particular, I started "excessively" slow (took me 2.5 hours to drink my first beer, but that was on purpose since I was out of food, and alcohol
really doesn't work on an empty stomach - count me out, I'm not willing to sell my body to alcoholism by doing something like that).
Here in Ireland we have days that become all day drinking fests, like St. Patricks day and the college RAG weeks (charity weeks that are used as an excuse to be drunk all day) and they get really messy. Especially in the smaller towns. I'm all for drinking, but not for idiots who can't hold it.
Such idiots are everywhere, and they are indeed a sad view. They certainly exist though, and have probably existed around here since before the beginning of the carnival. Now that I think about it, I don't think I saw that many locals doing this, if any. Those who do such things are usually young people traveling from Holland (being 50 km away from the border gets you a lot of dumb people from all over the world, that are just there to smoke the weed, and make a quick trip towards the south-east to get their bellies full of German beer).
For example in my hometown the college has stopped supporting RAG week because its become so antisocial. The drinking is confined to the a few streets of the small city centre and people are usually wasted by 2 -4pm as well - right when kids are going home from school. Now I'm not the type of person who usually goes hysterical with cries of "think of the children!", but consider some highlights that I witnessed last year:
The Altstadt and Königsallee ("Old Town" and "King's Alley", the places where most of these celebrations take place), are fully guarded with all kinds of police, gendermes, and anything else you can think of, from ambulances to firemen, normal traffic police to horseback police and riot protection dudes. They have a veeery good experience here with this kind of events, from the football games. I have never seen football hooliganism taken to such an extreme level as here, and somehow they do manage to keep it in place - and at the beginning of the next day, it's all clean and shiny again!! Seriously, those people deal with groups of 3,000 people coming down to party and beat up supporters of the other team every two weeks, after football games. This carnival can just be viewed as a more widespread manifestation of the same kind, from their point of view. Somehow none of them seems to result in too many accidents - don't ask me how. Maybe the intensive guarding that I've seen and the immediate beginning of the cleaning process are the answer - don't know.
A couple having sex in a doorway at 1pm.
A guy with his pants around his ankles in a stupor standing in the middle of a pavement pissing. Arms akimbo, ie. no hands pissing.
A guy taking a dump in a cardboard box in the middle of the street with a big crowd laughing and cheering him on.
These were only the highlights, people puking all over the place don't make the grade because its too common, same goes for vandalism.
However, as you're in Germany, I'm sure the drinking is handled in a far more social and non-destructive manner and its a very fun day out.
As I said, I'm not exactly sure how it happens, but surprisingly, this city is one of the safest in Europe, although it has such celebrations during the summer, a carnival during the winter, and every 3-4 weeks an event of this kind. As I said, it does boggle my mind how they do it. Well, watch and learn, that's the only thing I can say. So far, Germany is a model for me of the way things should be done, in everything pertaining to organization.