I tend to just note it in my head when I hear something casually dropped. I'm a type of person who is fine both not having a conversation but will engage sincerely if one is had at me. I went into a Lyft on the way to Dragoncon one year and saw a note that the driver was hiring impaired and would not communicate verbally.

"Cool, I'll just listen to music and/or read."

Then the driver started talking to me, and we had nice conversation about cons, nerd stuff, etc. He mentioned his boyfriend in a sentence but not really about his boyfriend, and all it really put in my mind is he probably had that sign up for people who could be problematic to talk about that stuff. I think I was maybe a little proud that he felt comfortable doing so so casually with me, but it otherwise didn't affect the convo in any significant way, nor did I feel any need to comment on it with him. Just some internal thoughts.