It’s just a style of art. It’s great for people who don’t particularly want the traditional formal shots of everyone standing in the front of the Church. As I said, I think it is wasteful to actually destroy the dress, but it won’t hurt anything to get it a little dirty for the sake of some amazing pictures when you can get it cleaned and then do whatever you choose with it.
I don’t know who started the trend, or when it came up, but I think it is a really interesting idea. I understand that it’s not something for everyone, but I really don’t see why there could be anything wrong with it.