This sounds like hippy shit.
I let the neighbors pick blueberries if they want. Don't care. Most years there are way more than I can pick. I generally grab 1-2 bushels to freeze and that's not even half of them. Makes good cobbler.
The birds eat well.
I keep meaning to put up a sign for that.
I have been swapping my gardens over to all either "edible" and/or native plants. Have 7 blueberry, 2 kinds of rhubarb, about 300ft of strawberries, and ton of raspberry. 4 kinds of mint. grape. 2 large apple trees were on the property when I bought it. pretty sure one is cortland, one is mcintosh, but im not certain. I planted a honeycrisp a year ago. and a barlett pear. that pear produced AMAZING fruit last year. Have a couple Hickory trees as well.
Pumpkins, decogourds, and sunflower are generally pretty consistent at re-seeding themselves yearly.
I also do tomatos, cucs, greenbeans, peppers, basil yearly. Watermelon from when I buy store watermelon, and throw out the rinds/seeds. haha.
I don't even eat the tomatos. I just give them away. (along with the overkill on everything else) Past years, I would put out a sign and "free". This last year, I put out the sign, "free, donations welcome" with a jar.
I made 75$ (i mean, not including cost, which time, fert, water, and seedlings cost more then that really)
Strawberrys/blueberrys/raspberry best left on the plant though. I need a sign saying, come get some.
Hickory is neat, cuase you can't really buy it. its a unique flavored nut. but getting at the meat is a pita, so no one really does it commercially. need your own, and a pair of pliers or a hammer.
All the state forests of CT, RI, MA are just littered with wild blueberry.