Peninnah and Hannal were sisters in the Old Testament. Peninnah had a few kids and Hannah had none. Year after year Peninnah would follow Hannah around like an annoying fly to dis on her, irritate her and shove this shame in her face (till Hannah cried and wouldn’t eat).
Interesting question though. Why you gotta be so rude? What benefit do we get from mistreating others? Despite what we may think, when we dis(regard) people, especially in public, we actually don’t come out looking any better ourselves.