It's one thing, holding open the door for someone at a grocery store, or the library, or just about anyplace else. But the doughnut shop is a different thing altogether. This is a get-in-and-out-as-fast-as-you-can operation. There's no room for courtesy or chivalry here.
“Consular offices make no attempt to determine whether the person obtaining the card is legally in the United States. In fact, the only people who need these cards are illegal immigrants, criminals and terrorists. Consular cards also are easily forged.”