No personal attacks
Posts about how so-and-so is cheating on his wife or likes midget porn will be deleted. This may be fascinating gossip, but publicizing an individual's "taboo" behavior typically obscures some other issue via indefensible social consequence.
Generally, leave names out and refer to job positions or invent a pseudonym for the person in question. A clear exception is reprinting all-program emails and press releases intended by their very nature for the public. There are other potential exceptions, but a good rule-of-thumb is to avoid using names altogether.