Overhearing a group of teens talking cruelly would invoke an eye roll at best from most of us.
But for one mum, she felt moved to speak up when she found herself privy to a group of nasty high school girls, and has shared her words of wisdom online.
Michelle Icard, from North Carolina, was at a local Starbucks when she overheard a table of girls making fun of their peers and whinging about disappointing gifts they'd received.
They laughed at a "weird" classmate who sang about being lonely in a school talent show and made fun of a "friend" who was presumably being pushed out of their circle.
Rather than turning away from the catty conversation, Icard decided to offer some advice, which she went on to share online.