If, as is the assertion of the OP, the world has changed street photography, why can't we, interested parties that we are, change it back?
A few months ago in this very thread I expressed my own personal distaste for the way things seemed to have become, based on the previous few times I'd gone out and shot in the streets. In one particular case, the most recent time, I was actually accused by a security guard outside a dance festival of being a paedophile (never mind that it was strictly an 18-years-and-over gig, and I was interested in photographing "people" not just whatever his perverted little mind imagined etc etc). Can you believe that? Anyway, that was at the end of a long line of similar encounters and mixed up with my having a heart attack a week or so later I'd decided that there were plenty of other things worth photographing, and (at least here in Melbourne) people could cease to be part of that.
Well, you know what? No! Screw you, hysterical a*holes. I like taking pictures of people. More than that, I'm going to take pictures of people when and where (within the law and the letter of the law) I damn well please.
If "the world" has changed so that "society" shuns us taking pictures of people, then "the world" is wrong. If it won't change, then we need to show it that it's wrong by going about our photography openly, respectfully and with good-humour (something I've always done, not that it matters to the hysteria crowd).
I can't believe, in one sense, that this has even evolved to be considered an issue, yet I recognize only too well that it has.
The world has changed for "street" photographers? Fine, then let's change it back.