>as of now anyway - is a harmless, if extremely stupid, outlet
As the article mentions people go as far as turning down relationships because of "mismatched star signs". That to me is not harmless at all, people make significant decisions based on superstition apparently exercising quite a lot of prejudice. Good friend of my family on my mother's side always was into herbal alternative medicine and people laughed it off. Few years ago she was diagnosed with breast cancer and was convinced she could treat it with some sort of rose tea. Well, she's dead now. These eccentric hobbies can be more detrimental than people give them credit for.
Financially that industry is apparently twice as large as the homeopathy market, so it's quite a big scam. I think we ought to be worried about this stuff even if there's no death camps.