The United States Senate repealed Don’t Ask Don’t Tell. This was the proper result, by the proper process. The law was changed by the legislative branch, and not by the executive branch nor the legislative branch doing an end around. As a (small l) libertarian, and indeed a civil libertarian, I applaud this move.
Many complaints about the repeal of DADT involve living arrangements. I have lived in co-ed housing many times, and I have lived with men who slept with men. I have also dealt with the existence of co-ed bathroom facilities. This does not lead to a hotbed (and I use the term deliberately) of sexual activity. Too much exposure really decreases temptations. It is hard to feel romantic about someone who has just thrown up on your wingtips because she drank too much (Again, I speak from experience).