On the first question, personally? I don't think I would have a different perspective; in fact I know I wouldn't, but that's just me. I generally know that I would never have those fears no matter what circumstances I found myself in, or anything regarding my sexual orientation. But, I do accept why many might. We are all different, and we are all alone with our thoughts when we switch the light out at night.
On the second question, you have kind of answered your own question there, because if we literally had a society of 'live and let live' attitudes down the ages, there would be no need to announce anything. The announcement 'mentality' comes by way of built up oppression, of sorts, and the fear of being rejected by society as a whole. That is just a sad fact of life, and the society we do live in.
But, what I am saying, is that if you have spent a large portion of your life in fear of something that you could simply remove, by changing your own attitude on any subject/people, then it would be highly unfortunate that such 'allowances' could result in reaching the end of your days with major regrets of affording other people to control your feelings, and thus your life.
No way on this earth would I personally allow that kind of control over my mental state to be handed over to other people. Again, that's just me. Other people's thoughts on the matter, and how they could/would control it, will be different.