We've discussed this a bit on the LGB thread and quite a few gay people are vocal about not liking the fetish part of Pride. As I said then, it's important to note that not all Pride events are like that, but of course the tabloid media aren't interested in those!
Also, regarding the bit in bold, I don't think that would happen in reality. After all, if someone genuinely has no problem with "ordinary gays" why would they change their minds based on something they see in their newspaper? I'm an "ordinary gay" -- in that I live a fairly ordinary existence, work full time, pay my taxes, have never gone to a Pride parade half naked, etc etc -- and I can't fathom that, say, my next door neighbour would say: "You know what, Ensay, I had no problem with you living with a man until recently, but I've seen this Pride thing and now I don't think you deserve equal rights".
I appreciate that's a more exaggerated example, but I don't see how if someone genuinely has no problem with gay people in their lives that they'd change their mind about people they know, based on what they see on TV or in their newspaper. And if they change their mind about something as fundamental as equal rights so easily, I'd venture that perhaps they weren't that much in favour to begin with?