Remember there's no such thing as a small act of kindness. Every act creates a ripple with no logical end.
You don't argue with a four-year old about why he shouldn't eat candy for dinner. You don't punch a mentally handicapped guy even if he punches you first. And you don't argue when a women tells you she's only making 80 cents to your dollar. It's the path of least resistance. You save your energy for more important battles.
If you have any trouble sounding condescending, find a Unix user to show you how it's done.
Be careful that what you write does not offend anybody or cause problems within the company. The safest approach is to remove all useful information.