"From my experience:
Families that do not punish children in the form of a spank or two: Kids end up losers, disrupters, the type you see in the grocery store where they're telling their parents to shove it...
Families that do:
Kids end up very polite, thoughtful, and caring.
That's all I need to know(My own experience). I'm no doctor, but common sense tells"
Bull. "Common sense" is nothing but a lable for reasoning that one doesn't understand. Nice try on the false humility though to try and lend validity to your arguement.

"Fallacy: Biased Sample
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Also Known as: Biased Statistics, Loaded Sample, Prejudiced Statistics, Prejudiced Sample, Loaded Statistics, Biased Induction, Biased Generalization
Description of Biased Sample
This fallacy is committed when a person draws a conclusion about a population based on a sample that is biased or prejudiced in some manner. It has the following form:
Sample S, which is biased, is taken from population P.
Conclusion C is drawn about Population P based on S.
The person committing the fallacy is misusing the following type of reasoning, which is known variously as Inductive Generalization, Generalization, and Statistical Generalization:
X% of all observed A's are B''s.
Therefore X% of all A's are Bs. "
http://www.nizkor.org/features/fallacies/biased-sample.html