Autism and Siblings

Came across this column by Jeremy Robb, a parent, on Technorati.

It seems these days everyone is looking for fault in the behavior of children. I hear complaints about "learned" behaviors, mimicking, and lamenting that the behaviors are difficult to "undo" in the best of families. I hear it even more so with my son, who, as part of his Autism, vents his frustration and excitement by head-butting. As such, I get complaints about potentially hurting others, or even worse, others mimicking his behavior.
I can understand how frustrating it is when your child starts to behave in a way that is deemed socially unacceptable. It's a constant vigil for most parents of children on the Spectrum as they try to help their children overcome these behaviors to better assist them in their social development. But nothing is more frustrating than having a sibling mimic the older child with Autism.