After reading the description of the book, I'm skeptical that this is written in it. It's a humor book that makes fun of bad grammar, it doesn't defend it.
Either way, you shouldn't pass off another's writing as your own opinion.
I noticed you do the same thing yesterday with the FGM, which was actually copied and pasted from WHO, but you didn't credit them. I didn't say anything but it really bugs me when people plagiarize.
I actually saw someone write PREGNT on a sign the other day