Yep, "polk" or pokeweed is what we always called it. In Southern Illinois it's prolific. When I was a young boy my parents and grand parents would eat it often and I grew to have a liking for it. I can remember it always grew heavily along the rail road tracks that ran between the small towns locally and in shaley areas around the abandoned strip mines. But you can find it growing just about anywhere. I would always stop and pick a "mess" if I saw any young plants on my way home while riding my coveted Yamaha TY175 trials bike ( sorry...taking a side trip down memory lane here....).
I think it is actually pretty poisonous if you eat the stems or leaves that are longer than about 6 inches. You would boil it a couple of times and change the water after each boil...just to make sure you didn't kill anyone

. The berries are poisonous too to most animals but birds have no problem eating them and then leaving quite a mess on any vehicle parked under a tree. Any herbicide ( Roundup etc.) should kill it if it's becoming a problem.