We have a withy (willow) fence and grow evergreen honeysuckle along it. The plants have joined up and made a thick mass of growth, with woody stems, and they seem to strengthen the fence, not weaken it. Willow fencing doesn't rot or break up, as it's pliable, and looks natural, rather than concrete or steel. I do like climbers as they seem to add another dimension to the garden. The only thing is, one has to feed the roots regularly with compost, as climbers are hungry! One of my friends has a long fence of concrete posts with slotted-in panels, and I have to say, it looks like a Corporation car park!