Wouldn't it be fitting to have a half dozen friends/relatives with those million candlepower rechargeable spotlights hiding in that lower field when the perp drives by and turns on his light? Think how much fun it would be to light up that pickup cab with everybody's spotlight trained on it all at once...can you say, "SURPRISE!!!" The mess on truck's upholstery would probably discourage Mr. Deer Jacker from shining that particular field again. Of course, there's always the chance the driver would be temporarily blinded, drive off the road, hit a tree and be permanently disabled or killed. In that case you're pretty much screwed, but you could try a self defense plea; after all, the other guy did "draw" first.