I would much rather see someone attempting to beautify their yard with plastic or silk plants than doing nothing at all. Some people simply do not have the means, ability or desire to do landscaping that meets a neighbor's tastes and standards.
This post makes me think of an older, small home on the main drag in my town, just past the high school. The house sits at an intersection with a traffic light. While waiting for the light to turn green, I noticed there were two tulip plants, one red and one yellow. Each was adjacent to the other at the start of the little walkway that leads to the front porch. It was late fall when I noticed these tulips since they were clearly out of season and artificial.
Those two tulip plants were there all year long for several years. On a couple of occassions, I saw a very small, elderly woman tending to her little garden while holding on to her cane. It melted my heart to see her taking such pride and enjoying her special treasures. I could never belittle someone like this dear woman. As the saying goes, "beauty is in the eye of the beholder".