To me there's only two reasons why people bring this kind of thing up with regards to schizophrenic person's unacceptable behaviour -- either they have no qualms with taking cheap shots on someone they know to have a crippling mental disability, or they're oblivious to the suffering that this kind of mental illness causes.

So which is it? Do you understand that schizophrenia is a serious mental illness that can cripple an individuals ability to process reality and participate in society?