Here I go.
I cannot stand it when customers ask about changing or cancelling a reservation, say something about unpredictability "oh, you know how it is with kids/grandkids!" and expect me to laugh with them about it. UM?! Do I sound old enough to have kids or grandkids and joke about it?! And even if I do, how do you know I'm not someone who's heartbroken because she's been trying to have kids for years but can't? Sorry, but STFU.
ETA: Additionally, I guess this is particularly annoying to me because a) I don't really want kids and b) I would never have considered making my parent or grandparent change their travel plans for me, whatever my age.
Now you go!