Business Insider article about double tappers

[employee 626]

Target drive-up workers say app 'double-tapper' customers are a daily source of chaos and disruption as they try to meet tight fulfillment deadlines

 

[IWishIKnew]

Seems to me Target could have a pretty straightforward response to people who double-tap--drop them to the end of the queue and give them a message that the TMs are gathering their items and will be out as soon as they can.