I went back in 2000 unknowingly and have to disagree. There were many gay people who used it as an opportunity to throw it in other people's face. People wearing "I can't even think straight" shirts for example. "Disney Gay Day" was another t-shirt. There were lots of making out too. I don't care if someone is gay, but there are alot of children around. When it's me and my wife I save that stuff for the room.
You are exactly correct and saved me some typing. In the early 2000's, Gay Days got a REALLY bad rap, and rightfully so. My brother and I visited twice during the event, in the early 2000's - and felt beyond uncomfortable.
There was behavior taking place that straight people don't participate in, in public. It was inappropriate beyond comprehension, and those years are what has given the event the negative stigma it's trying to lose.
If a family was going to go that week anytime in the early to mid 2000s, I simply advised them to steer clear - unless they were prepared to answer a LOT of questions.
Today, however, I believe Disney has taken action and advised them that they need to "behave" if they want to continue to receive cooperation from Disney. I've overlapped the tail end of the event in the last 6 years, and like some of the earlier posters said, It's no different than any other day at the parks. You don't see the freak shows you used to see, and the PDA has been reduced significantly.
Besides, you're among friendly gay company any other time at WDW, as a good sized portion of the Cast shares an alternative lifestyle....but they make some of the best CMs too!
If nothing else, go to their website (I'm not going to link to it here, but you can quickly find it on google) and look at their event calendar. You can just avoid their park of choice each day - which would be a good idea regardless because the crowds increase significantly.