Well count me as one of those. I had never heard of it. Not really pertinent to the teachings of Christ one would think though. Course there are a lot of traditions that have risen up in many denominations that aren't really pertinent as well
I just learned it recently. The internet has been a great place to dind these things out. I have learned alot about Catholic teaching. If you grow up in an area where there are not Catholics like I did you know nothing about their theology. And I suspect it is the same vise versa. But this is not something to argue over.