How about it taking profile (square) pics from Facebook?
Do I need to update everyone on my friends list to please use "proper" headshots for their profile pics so that some sketchy MS service can get it right?
I don't know how much this is going to matter. A 50-60 pixel circle or a 50-60 pixel square is little different for displaying a face, because even if they're perfectly centred you can't really see a person properly.
Here's a sample from my phone:

I've known him for 26 years, but I'd struggle to recognise him from that image. Fortunately his name will be right next to it.