This much is certain; Chiropractors cannot cure scoliosis, and if they make even a small mistake, you can be paralyzed for life. It takes great skill to manipulate the spine without causing damage, something that should be left to a physical therapist (around here you can set up an appointment with one to work on your back). You take too many risks with a Chiropractor, I think. There's too much of a gamble when trying to find a legitimate practitioner in that field.
Although I am not sold on the benefits of chiropractic, what you've posted here is just fearmongering. Paralysis is extremely rare as a result of chiropractic treatment--and certainly much less likely than if you had invasive back surgery.
I suggest you read the Mayo Clinic's overview of chiropractic care.
Chiropractic care, beneficial or not, is generally safe and statistically less risky than back surgery.
I never said paralysis by Chiropracty was common. I never even indicated that the majority of people who visit a Chiropractor would be paralyzed, neither many or even some, but I did stress the need to verify the credentials of any Chiropractor, even pointing people to a group of Chiropractors who base their work on science based medicine and not alternative medicine.
Chiropracty based on alternative medicine is dangerous.
You claimed it was "unsafe," implying it was less safe than more mainstream alternatives, which is demonstrably false.