The new and interesting thing from the article was that in the 1970's Dr Patterson thought two lowlands gorillas simplified sign language.
In my opinion, people generally lie about their skills, feelings or their visage on the Internet.
People lie because they are not happy with themselves, they want to look better than they are in front of their friends or colleagues.
I think that lying is in some situations justified, like if you don't want to go on a date with someone, you will lie to them about that you are in the relationship.