I must disagree.
The worst is when you are forced to listen to speeches about the same topic 30 times and all the speakers end with the upward intonation as if asking a question.
Like the plague, this "disease" is now spreading as well, once you notice it, you may not UN-notice it.
Haha, yeah, I have this friend, who is amazingly intelligent and, the craziest thing... She does it all the time. Needless to say, I tease the shit out of her.