Every rule, including this one, has at least one exception. Having children is hereditary. If your parents didn't, chances are you won't either. Moderation in some things.
Most people are in favor of freedom of speech for themselves and other correct thinkers.
Competence is always rewarded with more work. Once something exists in electronic form, it's only a matter of time before it appears on the Web. Through the miracle of parallel evolution, other people may have come up with the above items as well, but to the best of my knowledge they were original when I thought of them.