Funny, or Going Too Far?

Found an article at babble about this "children's" book, called "Go the F**k to Sleep."

What do you think? Too far? You can read the book and omit the F-Word, and just get rid of it before they can read it for themselves.  I find it humorous, I mean what parent hasn't wanted to scream this out?  What parent hasn't thought this after hours of rocking and bouncing a baby, or gently guiding a toddler back to bed for the 1,000th time?

The article on Babble has an excerpt of the book, but I'd really like to know your feelings on it!