I don't think it's such a bad thing.

The child was unruly, and needed to be restrained. That's not to say I don't think they shouldn't have tried something else, be it carrying her out or what not, but being handcuffed isn't exactly a traumatizing experience. At least, I would assume not.

However, the fact that the mother was angry about it is what gets to me. This lady needs to discipline her child. There's not reason for a child, even at age 5, to act like that. We've all been that old, we've all had fits and so forth, but it comes down to basic parenting, and if her child isn't going to act decent, then my personal opinion is that she shouldn't act like it's someone else's fault.

As for filing charges, that's a bit far.