Home wreckers at work

Here are two examples of human intervention, or as some would call it, "interference":

In Autumn, Nature provides squirrels with goodies like nuts and leaves. The nuts get stashed away for use through the winter. Since there are not that many nut trees in a city park like PCV, human intervention in the form of feeding is needed.

Fallen leaves are used by squirrels as building and refurbishing material for winter nests. But what's a squirrel to do when all the leaves get raked up and hauled away to a dump?

That's an odd-looking nest...
wonder if I should go in?