Not necessarily. If it were me I'd put them on the fronts, simply because I would want more grip on the wheels moving the car as well as doing the steering. You may end up with a safer car your way as it would understeer with greater aplomb, but there's no real need to do it that way.
No if you had more grip on the front you would push it more, rears would lose grip and your rear would spin out. Rears should always be in good condition on fwd cars.
Yes thats what Im saying Andlid, if you spin out on a fwd car its game over as you can usually steer out of it and there is no power at the rear wheels