Art, I didn't say you should be excluded but that some posters may wish to exclude you - subtle difference.
It is the same in other spheres too where professionals use jargon as an exclusion from mere public. Sometimes it does not work and you can either guess or know anyway.
I was once going in to the O-Club at Keflavik and here these guys talking 'discretely'. The words I heard were 'hot' and 'cold' and from that I knew who they were, what they were talking about and the details which, had I asked them outright, they would have clammed up about.
OTOH I was on a course and the course instructor kept using the TLA - MDR. I knew what this meant but the context was entirely wrong. I knew it as Median Detection Range whereas he meant Mental Dead Reckoning. Had he said Mental DR then all would have been clear.
As for using TLA in my answer, that was simply banter.