Rats? Hmmm. Free meat, fruit, and nuts!
Really, they are going to plant (and maintain) some sort of tree, why not something that could produce food? Have Boy Scouts or church/community groups pick trees for food pantries, whatever, but I'd bet some of it would be eaten, anyway--by humans.
You are too logical and practical.
Fifty years ago, this idea would have merit and some enterprising people would have figured out how to pick, pack and profit.
Not any more - the gubmint is too restrictive and domineering and the public too lazy or litigious.