Originally Posted by PhilB
The rear brake is a useful tool, and does help you stop faster if you know how to use it. Therefore, you should learn how to use it. Your advice to her is poor. She should take a course or two, to get good instruction (probably wouldn't hurt you to do it, either). The advanced MSF course includes practice with the rear brake, including controlling your bike if you do lock it up.
It's a useful tool, but not for the reasons you lecture on. You're talking out your ass about things you are unfamiliar with. Who are you to lecture to anybody?
Anytime somebody posts "if you know how to use it" it means he is bullshitting. If he can't explain better than that, he doesn't know what he's doing or why.