I'm sure that happens, but there are a lot of people on this board. I could see some people not crossing "paths" often. I don't always read every post in a thread either. Sifting through 50+ pages of a thread is not something I always want to do or have time to do before posting, so I have probably missed a few people here and there.
Edit: I can't say that I recall reading a lot of Dreaded Anomaly's posts, but I did read the one in question and I thought the joke was pretty damn clear, but maybe that is just me.