This is what our Southern mothers taught us to do. If anyone is being ugly to you, you DO NOT stoop to their level. You "Kill them with kindness". By the way, that doesn't always work. But, it makes your Mama happy.
I always feel bad when I come home from work and my cats are just like. You were gone for forever. I counted. (Then I walk into the living room and am greeted by a pile of cat vomit, and I don't feel bad anymore.