I would have an anonymous "who gives a shit"
alert button, which I personally would use for all the people who publicly tag their mate on an in-joke or when they're arranging to go out together. Why can't you just privately message them? Why does everyone else have to see a joke they don't understand or arrangements they're excluded from?!
I would also have a "stealth brag" alert button you can press anonymously when you see one! I might wear that one out!