This topic is a bit interesting to me.
On one hand.. I have said/done things when too intoxicated to remember. I literally just don't remember them. They aren't particularly bad things, or mean things like described.. but I can see people being at a point of intoxication where they just don't know what they're doing the way they would sober. With the people I drink with -- I can tell the points in time where they will not remember anything past. They'll do a certain action just so out of character that I can't help but go, "Yeah. They're blacked out right now." And sure enough, they have no recollection of the event. It isn't them, or who they really are..
On the other hand.. People utilize this genuinely somewhat odd phenomenon to make excuses. It's so easy to say "I was drunk".. A convenient scapegoat. Like a less risky risk. Want to tell a girl you hang out with you like her? Say it while drinking.. If she rejects the idea, you can cover your tracks with "I was drunk, sorry. I probably didnt even know I was talking to you lolololol. You know how I am with vodka!! Amiright?!! Hahah!" People ARE less apprehensive about saying the truth. I've had people come apologize to me for saying/doing something under this guise.. and although I knew they weren't intoxicated enough to be doing silly, stupid shit.. I can't really call them out on it. So I have no choice but to take their word on it. It's a crappy, cowardly sort of way of going about it.
There are also those odd situations where people go into drinking knowing there's a risky situation in the air, but that's a whole other animal.
In the end.. I think it's cowardly to say you outright lie while drinking. If you're KNOWN for it (i.e. You call yourself William Greenleaf Hutchinson the Third and DEMAND to know why everyone is calling you Suzette.) then I could see it.. but usually, people just show their true colors without a filter. It's a gray zone.. On the one hand, guy could be frustrated with his group of friends over a situation. That + alcohol could blow it out of proportion, and he could vent things going on in his head he knows aren't really true. On the other hand.. It's still cowardly to say it's ALL a lie, when there was a base of truth involved.
I respect people that own up to a situation, and maybe apologize depending.. but I don't like it when people try to play it off as if it were all a facade. Rum doesn't make you lie your ass off.
Edit: In response to --
I've had people say some pretty rude things to me sober and it shocked me. I think of one instance off the top of my head where we just... don't communicate the same way anymore. Ever.Question: What if someone you really liked and felt close to as a friend got really drunk and told you they hated your guts or something like that? How would you react? How would you approach it after you'd all sobered up? These things do occasionally happen out of the blue.
Although I've never had anyone SAY anything particularly evil to me while drinking, I have had a guy DO something pretty vicious to me. We still aren't talking the way we used to. It went from nearly every other day of talking to radio silence. I'm not really up for fixing it either..