"Rick and Lynn don’t believe she suffers from schizophrenia, or any other mental illness."
The source added, “Even if Amanda is placed on another psychiatric hold, her parent’s are saying they have no interest in becoming her conservator again. It’s such a sad situation. And it doesn’t look like it will end well.”
http://radaronline.com/exclusives/2014/10/amanda-bynes-new-york-schizophrenia-concerns-marijuana/
Either she has a serious drug addiction (and no, smoking pot alone shouldn't cause her to behave like she does) or she has a serious mental illness. If marijuana is really the only drug she is abusing, then she is reacting to it in a way that still indicates mental illness. I think her parents just don't care