Dear Abby: Stepson honors his late mother with this tacky tribute. Should I say something?

Dear Abby: My wife of 48 years recently died, and my stepson put some artificial flowers on her grave. I was surprised to see this when I visited on the eight-month anniversary of her death. Both my wife and I always considered artificial flowers tacky and not appropriate for cemeteries, even though lots of people decorate gravesites with them.