There is a huge difference between McTimoney Chiropractors and GCC registered Chiro's as the qualification period and level of study required to be a McTimoney Chiro is much less.
Its weird, over in Canada you see Chiropractic clinics everywhere as people have to use there own cash to get better so generally want to use the best, most cost effective solution (ie: not shitloads of drugs to mask to symptoms)
Still as my mate says, if you want to live with the pain to the point the drugs can't mask it anymore, and you can't sleep/walk/drive/think that's up to you, however if you want to try and fix the problem then you can try a (good) Chiropractor, but if you are convinced its a con then have a nice life and he's wishes all the best with living with your pain.
I know it works for me, and ironically when I really knackered my back, the spinal consultant I spoke to recommended the clinic my friend works in, as he said the last thing you want is me operating on your back as once I start, it will never end.