In short - yes, but don't.
In long.......
Whilst you can put the bend in, it'll also encourage the arm to bend in service (particularly when reversing) - in a kind of 'terminal to arm' kinda way.
At the very least, any non-straight rear arm must be reinforced to ensure that its the bush that absorbs any axial loading, and not the bend in the arm.
Bending the rear arms does also serve to shorten them fractionaly, which upsets the castor of the axle. Whilst this doesn't effect the steering, it adds a bit more strain on the diff UJ and on the damper bushes.
Other solutions to the problem (which isn't much of problem, in all honesty) is to either buy a set of cranked radius arms, or to buy a set of wedges for the trailing arm bushes - these serve to reorientate the bush instead.
HTH
cheers
8)
Eeyore