  The smallness of the quark and lepton parameters and the hierarchy between
them could be the result of selection rules due to a horizontal symmetry broken
by a small parameter. The same selection rules apply to baryon number violating
terms. Consequently, the problem of baryon number violation in Supersymmetry
may be solved naturally, without invoking any especially-designed extra
symmetry. This mechanism is efficient enough even for low-scale flavor physics.
Proton decay is likely to be dominated by the modes $K^+\bar\nu_i$ or
$K^0\mu^+(e^+)$, and may proceed at observable rates.
