If you eliminate DADT, then what are we left with? Feel free to ask, feel free to tell? We don't tolerate open conversations about sexual preferences in the work place or in normal pubic conversations - most people find it offensive.
I know there are places in San Francisco where gays and lesbians feel comfortable making a provocative remark - and in its place, that's fine with me.
Live together, get married, go to bars and parties together - that's okay with me... as long as I can walk the other way. What I don't want is being forced to stay in a small environment, like standing watch while on patrol, or while working on the bridge of an navy vessel while two guys carry on an openly gay conversation which I am forced to listen to.
I wouldn't tolerate it at an office party, or in a board room. At the same time I wouldn't want to be forced to hear "hey, you got a cute ass, I'd like to get some of that", when I am forced to stand a 4 hour watch with these two guys talking nearby.
To me it is all about societal norms. Maybe a little difficult to define, but DADT seems to fit the military situation just perfectly.