Certified GKH Gardening Expert
I think they are beautiful, too, and that is one of my fond memories of my grandmother's house when I was young. They are considered short lived, with weak wood and a bad habit of reseeding groves into disturbed areas where they shade out native species. There are a number of trees and shrubs that are considered a threat to native species. Another is the non-native burning bush, which I see everywhere. It is reseeded with help from birds eating the berries and is considered invasive.