A Brooklyn McDonald's is checking the IDs of some of its customers. At the restaurant in Flatbush, one sign reads "Come on in." Another sign says no one under 20 is allowed without a parent and ID.

It was one Big Mac attack too many. A crime-ridden Brooklyn McDonald’s is carding customers at the door and forbidding anyone under 20 to enter without a parent or proper ID — in what might be a first ...