As you mentioned, that thread was quite awhile ago...it's coming up again now because it actually scared me off the site for a while. Perhaps I'm making a mistake by taking things to heart, but this seems like a pretty kind and considerate community, so I was a little shocked by the response.
Thanks for the advice, and I really appreciate those of you letting me know I wasn't the only one who found it a little over the top.
For what it's worth, I'm also surprised when this happens, and it seems to happen more often than I would think. Posters are often congratulating each other on the civility of this forum--and most posters really are civil--yet when the topic is contentious, I do see an awful lot of sniping and defensiveness and personal attacks. It's to be expected on any forum, but it does seem more disappointing on an etiquette forum. (By the way, I have no idea what thread you're talking about; I'm just speaking in general.)