Looks like she pretty much decimated it anyways. I'd definitely kill it out of spite, though.
Neighbor feuds are simultaneously awesome and the worst. My old place I had a couple of giant old cherry trees. Half my neighbors seemed to think it was kosher to just come over and help themselves. I thought about raging, but honestly, it was 50 times more cherries than I could possible use, so what's the point?
Its the principle of the thing.