I took a quick look over my pal's bike at work yesterday and found her front brake was disconnected, which I duly fixed and told her. She said it'd been like that for two weeks and had mentioned it at the time. I have no memory of this conversation, which is no guarantee it didn't happen, but I really can't see myself letting a broken front brake go unattended.
I was more than a little gobsmacked that she'd not been badgering me every minute of the day until I fixed it, only to have this madness topped by another colleague who told me she'd be riding down to Stockbridge with a friend who was running every red light, and when she finally caught up with her down a side street and asked why she was riding like such a nutter, was told casually 'oh, my brakes don't really work'
[insert Jackie Chan baffled meme image]