A pruning dilemma

This afternoon during our latest pruning session of winter jasmine, ivy and honeysuckle that got in the way I stumbled across this dilemma. My neighbour had been training our winter jasmine and honeysuckle by using wires across what is in effect an alleyway that leads to their garden. I'd left the climbing plants to grow longer so that I could persuade them to grow along the fence and trellis more easily. Anyway, I was part way through cutting the extra growth when I noticed. The dilemma is that although it is our plant, and we feel an obligation to keep our plants trimmed it was clearly on the neighbours side. What to do?

In the end we cut the plants, as we could cut them from where the fence was and we felt that best met our tidy garden conscience. And after all the plants are situated our side of the fence.