I used to breed goldfish, and culled the (BADLY) deformed ones that couldn't have a proper life.

But jeez for snakes? As long as it's not too bad (I haven't bred snakes before but I assume serious deformities in snakes are much more uncommon than with goldfish) I'd keep a snake. Hell someone would buy it for 40 bucks as a pet. Culling because of color or slight imperfections? That's just wasting money. That's the breeders loss and the snakes loss of life...