Are you serious?
Any method of training can be used incorrectly. I could give you countless examples of highly aggressive dogs whose behaviour was successfully modified with a training program that at some point involved corrections. Bad 'positive only' training can also make a dog's behaviour worse. Dog training is not black and white, not every dog is the same, nor responds to the same training methods.
The notion that putting a check chain or any other correctional tool on a dog will turn it aggressive is absurd, at best.