We choose to leave about two feet of native plants and weeds growing the fence line. It offers a little more privacy and we have a season full of color that way too. As soon as one type of 'Weed' is finished blooming another starts.
As you can see from the photos these flowers were covered with butterflies and bees. What a photo opportunity my little walk proved to be.
After giving it a little thought, I guess I need to remember that a weed is not a weed if you invite it to live in your garden.