In another thread, Brieuse stated this perfectly:
I'm guilty of this, too: a couple of my character defects are a penchant for brutal honesty and an ability to craft words with surgical steel precision (which also cut with surgical steel precision).
If what we're about to post is something we would never say to another person when speaking to that person face to face, or it's something which would offend us were that thing said to us -- then don't post it.

A tip is to think what you would say if you were speaking to that person face to face. If you wouldn't say it, don't post it.
As tempting as it is to want to "squelch" our opponents once and for all, it behooves us all (me included) to remember that our opponent is someone created in the image of God (just as we all are) who is a flesh-and-blood person with feelings who can (and very well may be) hurt by our carefully-crafted pithy phrase or our "gotcha" statement.
I'm guilty of this, too: a couple of my character defects are a penchant for brutal honesty and an ability to craft words with surgical steel precision (which also cut with surgical steel precision).
If what we're about to post is something we would never say to another person when speaking to that person face to face, or it's something which would offend us were that thing said to us -- then don't post it.
