Sorry to hear of some you punching/hitting or whatever to the extent that you do/did it.

I guess for some people this could be a problem and cause damage. HOWEVER, I do it no harder than a good solid "knock on a wooden door" type hitting (and typically with my knuckles like when knocking on a door) or the occassional door jam.

I do not think MY way of doing it is harm. I think it is just "regulation". I guess I will just have to agree to disagree.