I'm with Chuckracer and Wonway on this. Chuckracer sums it up nicely. Try these for yourself and you'll see.Does it work?
I'm a big proponent of rear brakes...critical for coming to a smooth stop without a lot of fork dive (or your passenger banging their helmet on yours), U-turns, with a combination of slipping clutch and dragging rear brake can be done full lock, no problem, and a dab mid corner if your a little hot or wide can tighten your line without chopping the throttle - important if you are on the edge of the tire.
Rear brakes are good!