It's not new either. When I first got my K750i back when it came out, I got a program called Bloover and I could rip quite a lot of files off people's phones. Without their consent - there was originally a bug in the way Bluetooth was implemented.
I also tried, for the lulz, to try and get this girls phone I know to phone mine, so her number would come up on the screen. It worked, and I was well chuffed. She wasn't impressed.