‘People buy that’: Costco customer catches shopper sampling grapes from 3 boxes—and putting them back on the shelf

An encounter in the produce section at Costco has sparked a debate over taste-testing etiquette. The recent 16-second TikTok video, posted by Isabel (@isabel.langhorst), quickly went viral, amassing over 321,000 views.

In the video, Isabel captures the moment she confronts the shopper. With the camera pointed down at her shopping cart, the on-screen caption reads: “Went to Costco and saw a lady literally opening up three to four boxes of grapes, trying a grape from each box, then just...