It's ironic that this subject be brought up about now, considering I just got an email for a petition involving a six-year-old girl who was handcuffed and arrested by police for throwing a "temper tantrum" in class. She was also suspended from school for the remainder of the year and has been traumatized by the experience.
Change.org - Start, Join, and Win Campaigns for Change
It's already got damn near their goal of petition signitures, but if anyone feels so inclined, they can sign as well. I already have.