I was in a shop today when I noticed that the person behind the till was wearing a big badge in the trans flag colours with the words "They Them" on it. It's the first time I've seen one of these and it just set me to wondering what the point of them actually is.
If I'm participating in a retail transaction with a shop assistant, I'm not going to be using their third person pronouns. At most, I might say "you", as in "Could you put it in a bag, please?", but surely I'd only say "he/she/they" if I was talking about that person to someone else? Perhaps I've missed something, but it seems like a way of drawing attention to one's special status in a situation where people might otherwise not notice.
And anyway, if I hadn't spent so much time reading about this stuff on MN, I would probably have assumed that They Them was the name of some band that I hadn't heard of. There was The The back in the day, after all...