Kacey, I don't consider that to be corporal punishment. She did not cause the child to suffer pain, she used psychology. The cupped hand on diapered bottom made a big noise that startled the child. Well done Mom. A judicious use of one well placed "swat" when all else had failed and the consequences of not disciplining the child were dire. I find this appropriate as well. Now if Mom had backhanded the child, I'd have issues with that.
Lori M
And yet... other people in the courtyard were yelling at her for hitting her child; one threatened to call social services and report her for abuse. A big part of the problem, as I see it, is that in a laudable effort to prevent abuse, a large selection of discipline tools have been taken away from parents. Do I think children should be beaten with switches, or belts, or hairbrushes? No... but there are times when a swift swat - as I described previously and sometimes harder, depending on the circumstances (usually involving safety of the child or others) is appropriate.