A chiropractor?

Am I delusional or am I correct in thinking chiropractors are practitioners of something a little above blood letting and way below actual modern medicine?

...

However, I haven't done any real research on this subject. The idea that chiropractors are practicing sham medicine is just kind of background knowledge that I'm not really sure where I picked up.

Same for me. I was a little bit shocked to read that someone on LessWrong goes to a chiropractor. But for me this attitude is also based on something I considered to be common knowledge, such as astrology being pseudoscience. And the Wikipedia article on chiropractic did not change this attitude much.