We try to teach our kids to be honest and not to lie, but I don't think we'd like what we'd get if children were always completely honest.

I always hate the inevitable interrogations when something gets destroyed, and nobody knows how it happened. But, I imagine the complete opposite would be even more frustrating:

Who broke this?

Me

How?

Ninja moves.

Will you please be more careful?

Probably not

Don't you even care?

Not really.