I always send a chastising reply. I know one message may not do much, but I've been surprised to occasionally get a response (usually from smaller vendors) prom

I always send a chastising reply. I know one message may not do much, but I've been surprised to occasionally get a response (usually from smaller vendors) promising to be more judicious in the future. If enough people bitch at them for wasting eyeball time with trivial matters they might take notice...