That's nice; not all of us have property extensive enough to grow wild berries. I live in Queens, and property is quite dear. And if I had blackberry bushes, someone would steal the fruit. It's been a struggle, but I finally got some of the more cretinous locals to respect my extensive and beautiful garden out front. My immediate neighbors take up the slack, because they adore my garden, too
There are Stew Leonards around, but they are not close. I have no reason to visit them. If it came down to it, I'd make my own guacamole. I just find it convenient to visit BJ's Warehouse and get 16 single serve pods, because then the guacamole does not turn brown.
Blackberries are like weeds here. They’ll come up anywhere if you don’t mow them down or pull them out of your landscaping beds. Pokeweed is the same.