Is ignorance really bliss?

Global warming, human trafficking, disease, war, poverty, sonar effecting marine life, ineffectual schools, crime…ahhh!

If I stop reading Rolling Stone, the Utne Reader, National Geographic, and books about our political system or our prison system (for example), and decide to remain ignorant about the current state of the world, will I be happier and more content?

Is it worth it to sacrifice knowledge for happiness? Would you?