Blackberry vines crossing the fence

Our neighbors permit a patch of blackberry vines in the corner of their backyard, and these send explorers that I try to extract with shovel and heavy gloves. It’s not just the neighbors; our place is near the thickets by the railroad banks, so I’m always on the watch for starts, since birds drop seeds designed to survive ingestion. The leaves are pretty, and I like the berries, when ripe, which also feed the birds, and the vines shelter rabbits, but I take issue with the thorns and would prefer them elsewhere.