Why are people complaining about how others spend their own money?
If you don't want designer clothes for your kids, fine. Mind your own business if other people spend money that way.
Because they are social hazards. We are not talking about people who can afford such spending sprees.
I know how these spoiled folks grow up to be in large numbers.
I will assume you said that as a libertarian, and not as a parent who wants to foster the right attitude and values in his kids.
"Why are people complaining about how others spend their own money?"
It's fun.