Never been a big fan of bull bars, with minor collision they usually take entire front out... including a hood. There is not enough support on the bottom mounting points to sustain even minor impact without folding the bar. They look cool though
One would need to do a lot of reinforcing of the unibody substructure so that a bull bar wouldn't bend upon impact and take out much of what it is supposed to protect, especially for a later generation RAV. But if I recall, at least a couple of owners (maybe in Australia) have installed them and they have been effective.