Only when people get the two confused. Otherwise, it pretty much exists entirely independant of it (aside from the names of things). By the same logic, card readings is an insult to blackjack, and palm readings are an insult to the glove industry. They're just crazy ideas that some people believe in, and many people get a kick out of.

Astrology isn't bad science. Not in the sense that all the other bad science talked about in these forums is, anyway. It's just one of those old "New Age" things, and an astronomical argument isn't going to show someone that it's wonky, just as a neurosurgion isn't going to disprove the existance of a soul. Science has nothing to do with it, good or bad, and thus can't prove or disprove it.

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"I'm making wheatloaf. It's like meatloaf, only with wheat"
"Isn't that just...bread?"