Just because you're a Costco member doesn't mean that you can act nutty in the store.
At least that's what dozens of Costco workers recently told Business Insider when they spoke to Costco employees about their main gripe with shoppers.
Business Insider rounded up 31 things that Costco workers are dying to tell shoppers, but can't.
They wish that they could tell Costco patrons:
1. Have your membership card ready at the door.
