I am always surprised by the protein craziness that is the hallmark of nutrition.
Most people in Western societies eat way too much protein, and it is not really good for your body.
Unless you are a bodybuilder and want to build muscle I do not see a need for trying to increase the protein intake (and even for bodybuilders, I personally am rather sceptical. You do not grow muscles by gobbling down protein, otherwise the average person eating the "Standard American Diet" would look like Arnold Schwarzenegger, right? You build muscles by lifting heavy weights).
Take a look here:
http://www.vegetarian.org.uk/factsheets/Protein-vegetarian-vegan.pdf
Best regards,
Andy