Rise & Chime In: What are some unwritten rules?

CHARLOTTE, N.C.– There are some rules nobody ever officially teaches you — but somehow, you’re just supposed to know! Don’t stop in the middle of a busy walkway, don’t play videos on your phone at full volume in public, and if somebody holds the door for you, at least say thank you! So this morning we want to know: What’s an unwritten rule you think EVERYBODY should know and follow?