Blacking out is why I stopped getting drunk altogether. I remember waking up one day, back in my Army days, and started picking rice out of the vomit that was encrusted around my face. I washed my face, walked out of the latrine, saw my friend in the commons area, (it was his barracks room), and he could barely look at me, seemed ashamed. Then, a very short, very muscular infantryman came up to me, and told me that if I ever did any shit like that again, he'd throw me out the window himself. I was mortified and embarrassed. He was apparently the next door Barracks room resident, and apparently I had an altercation with him the previous night. My buddy then told me that he thought I should just leave, and he was pretty obviously ashamed of me. Been over ten years since then, (this was 2009), I'm still friends with the buddy whose barracks room I was in that night, and he still hasn't told me what I did, and I feel at this point that I don't really want to ever know; I already have enough shameful memories, don't need more reminders of what an idiot I am/was.
I still enjoy a drink now and again, but I refuse to get that shitty ever again. The shit can ruin your fucking life man. If you have more sense about you when you black out, then good on ya, but I just can't trust myself past that level.