It definately has to be an individual decision. Make no mistake, my son was abusive towards me -- verbally, psychologically and, yes, physically. But I knew my son well enough to know that something was causing him to act outside his true nature, that he was ill, not evil. I knew my son was a good and compassionate person who loved and respected me and regretted the behavior that was caused by his malfunctioning brain. Had those things not been true, I may have chosen an entirely different path.
(Thanks, MWM. For everything!)