From a reader of this blog:
A linguist named d’Armond Speers has been in Colorado news lately because his wife is running for the school board in Denver. Some years ago, Speers decided to speak to his baby son only in Klingon, while his wife used English. This continued for five years until the kid refused to respond to Klingon. I am wondering what your opinion is of an experiment like this? Good for the kid, or just notorious for the dad?