Heck, if it really pushes you into a depression then you are really weak or they went too far. =__=''
Not all kids are "weak" if they go into depression about child abuse; some children are more vulnerable than others.
I believe in physcial discipline, as long as its within reason and is NEVER done in anger. A good swat or two on the bum isn't "abuse"; its physical discipline. I think it should be reasonable, as in accidentally leaving shoes out in the open in my eyes dosen't deserve a spanking, but a mere scolding.
I think going to your room and groundings are more effective, but I think its because I have a bit of a attachment to my computer, Ipod, T.V., etc. But physical discipline isn't mean, the child will most likely become more behaved and polite.
Though I think that it all depends on the child, age, maturity, and how the parent reacts. It varies a lot throughout parents.