Interesting in this context is completely divorced from morally good/bad. Could be any group from any area at any time in history. I’ll start with a few, followers of the cult of pythagoras, contemporary black Hebrew Israelites, antiracist skinheads and the Amish (neo-luddites in general). Don’t be racist or a prick to other people discussing.
I have a nephew whom I love very much, who suffers from paranoid schizophrenia. Whenever he has an episode I try to explain that nobody’s talking about him behind his back because people in general don’t give a shit about anyone but themselves and if they talk about anyone it’s only about themselves.
In other words of course, but still. We are not that important to others. So much so it is a real societal concern.