The stuff that passes for food these days is amazing!!! And I thought it was bad when I was in college in the 70's. My roomates and I joined a newly formed co-op, so that we could get organic food and as much unprocessed food as possible.
Now, that's why I grow my own as much as possible. But the whole GE modified stuff makes that so much more difficult, because as you stated Free, bees cross pollinate and so does the wind. That is why I had jumped on the band wagon years ago, trying to fight the big companies. I think if there hadn't been such a public outcry at the time, things would be much worse.!!!
I am fermenting plum juice. It happened by accident and I decided to go for it. I left the juice out on the counter too long

Now I plan on pouring it into a food-grade five gallon bucket, cover it with some cloth and let it go. I should end up with either plum wine or a plum cider type of beverage. If it ends up no good, it could be made into vinegar. One of the books I picked up at Goodwill a few weeks ago has a nice big chapter on home made beverages that used to be made by the people of the American Heartland. Many of them were alcoholic, which makes sense, since they didn't usually have refrigeration as we do now. So, if they had made a nice big batch of juice and left it on the counter for a few days, it would have started to ferment also.

Especially since they were making their own yeast or sourdough breads, so the environment would be full of yeastie beasties ready to jump into anything sugary and do what they do.