I'm no security expert, but when I saw they did that whole "easier sharing" thing over e-mail that raised a major red flag for me. It seemed quite obvious that many of the previously secure systems would now be broken by that insecure e-mail sharing system.
I disagree...
My guess is that if you choose to enable features like that you're most likely opening a door, but if you don't it won't compromise anything.
At least, that's how any competent developer would code it.
