Of course, I would not be me if I did not also inform her that I think she is being crazy. Wouldn't it be sort of parental malpractice not to at least point it out?
Well, I would even go one step further and stop her doing that if I feel, it will do damage to her. Sometimes they are crazy but little do they realize the consequence. As a parent, we just cannot let them do it and then face the consequence later. Always better to prevent than cure.