I'm going to go with the "full moon" theory here.
Yes, the post repeated something mentioned in an earlier post. Yes, we should do better about that (Steve posted the link). But we don't always, so an "oh, yeah, thread (link) covered/discussed/beat the senses out of" is fine.
The old guys (myself included) know a lot of what is on the internet is rehash of something that should have vanished from the face of the earth years ago, but the new guys find it. Happens every few weeks - someone fires up google and posts ad-nauseum about the results. It doesn't really break any rules, and sometimes something new pops out. If we do like some other forums here and just outright ban links, the baby goes with the bathwater.
Yesterday I locked a thread for this same sort of bashing. I'm not going to take sides here, no one is completely in the right. I'm going to leave this one open (for now), but the ugliness needs to stop here.