A man after my own heart.
I think the solution to most, if not all problems in this world, would be simply a severe depopulation. But that's a little off topic.
On ignorance and it leading to bliss, or happiness which is more commonly used, it's more like a case to case basis and not a definite fact applicable to everything. Some people do genuinely want to know the truth and get the facts, even if it causes them misery. But personally, all I want to know is what I want to know. And ignore the rest.