I think we're quite responsible enough, no need for homeworks. The only people who likes homeworks are nerds, which I presume, your one of them.
There are far worse consequences out there. Nothing wrong with being a nerd! :D
I'm obviously in the minority here, but I loved homework. Whenever I had nights of homework from one class, if at all, I'd be really bored. Also, with the exception of my chemistry class, my classes were generally so short that 75% of the class was reviewing information, going over the homework, or holding some kind of discussion. By the time we were done with that, the teacher would have to rush through the new information and I wouldn't have a chance to see if I really understood it.
I had/have the bad habit of handing in things a few days too late, and I have trouble managing my time/assignments, but that has nothing to do with homework itself. I don't even get that much homework now in college (90% of it has to be done on campus) and I still hand in things a few days late.