Recently I was reading a blog about a mother of an Autistic boy.  She had many concerns about his behavior.  When he acted out she would tell him to wait until his father got home and he was going to be in big trouble.  What does this mean to an autistic child?  First of all it lets the child know that you have absolutely no control over him or her.  Secondly, it suggests that the father might be abusive or very strict towards this child.  If this is the case abuse is not the answer.  This only teaches this child to be abusive towards others.  This mom should be firm and share the responsibility of disciplining this child. Time-out, limiting their play time, rewarding them when they do right and speaking to them in a firm voice helps a great deal!  Gregory can be manipulative if you show fear towards him.  I learned to look him in the eye, speak in a firm voice and be consistent with what I say.  If you don't do this, then this child will make your life a living hell!  Trust me, I've been there and I've done that!