Well, I use others' awareness of my hearing impairment to gather some intelligence about what's going on around me... and I store that info for deployment at the appropriate time.
For example: I was once wearing an orange turtle-neck sweater, and one of my colleagues (who thought I couldn't hear them) started snarking about me to another colleague, remarking that I looked like "Thelma from Scooby-Doo".
So I waited until a little later in the day when I had to correct them on some of their work, and then I added in: "Oh, by the way... it's
Velma from Scooby-Doo."
Let's just say, the gossip certainly dried up pretty darn sharpish at that point.