The only thing I really don't get? Is how inflection has changed over the years? So every sentence? Sounds like a question? Even when it's not?
The question-end isn't a recent thing . . . it's been going on since I was in junior high, and I got out of junior high in 1983.
I think these folks have the mentality of scared little bunny rabbits. Specifically, they're afraid to put their character or reputations on the line by actually declaring something. Instead, they phrase their timid little statement as a question, hoping to build consensus. They feel secure only in a group. I find them pathetic.