Why do we have to stand on a COVID dot in the store line ups?

the29thhuman
We alI have to stand socially distanced from the person in front of us and the person behind us. But anyone else doing anything else around us in the store, can cut through our spots? I dont understand the point of the COVID dot on the ground in the line ups.
Why do we have to stand on a COVID dot in the store line ups?
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