The issue I have with chiropractors is how they market themselves. Rather than trumpet their positive values to healthcare (largely musculoskeletal, namely back ailments . . . which make up a large percentage of average complaints at a Family Practitioner's office), the business/advertisement strategy I have seen most from chiropractors is two-fold:
1. Trash medicine vehemently. If you've got a website for your chiropractic business, make sure 90% of it includes links to dubious articles by halfwits who love to tell you about how all MDs/DOs are evil dragons and DCs are the knights in shining armor. Then throw in a ridiculous Mercola article to say "see, a physician agrees!"
2. Make wild, unsubstantiated claims about their profession, like the poster who mentioned increased fertility due to a cervical spine adjustment, or curing with allergies/pneumonia/diabetes with a musculoskeletal adjustment. This is insulting to anyone who knows better. Sadly, there are a lot of people who don't.
Chiropractors COULD have a valued role in medical care, but at this point they're their own worst enemy.