My experience as a daughter (not a parent) is that parents can successfully isolate their kids from cultural influences if they isolate them from culture - few friends allowed, only infant TV (which had a lot fewer commercials than modern shows), no after school activities. I guess the present-day equivalent is home schooling.

My opinion is the social isolation and the lifelong impairment in the ability to have social relationships, just aren't worth it. Eventually an adult can teach herself how to dress and groom herself; learning how to interact with peers needs to happen in childhood, I think.

Oddly enough, my mom did raise me on the fantasy that someday I might marry Prince Charles, who's my same age.