HA! I like those. One of my favorites is especially apropos for forums:
I ka 'olelo no ke ola, i ka 'olelo no ka make.
(missing diacritical marks)
basically, translates to say that in words there is life and in words there is death. I think it's something good to remember, especially in a place where words (and emoticons!
) are all we have to convey our message.
Another favorite of mine comes from Dave Barry:
A perfect parent is a person with excellent child-rearing theories and no actual children.
I have used both those "pearls of wisdom" as signatures on message boards over the years (along with "I make milk, what's your superpower"
)