The internet lets us become informed, if we only are willing to put in the time and the effort. That's new - the ability to easily and confidently look it up, learn about it, process it and publish to see if you got it right.
"Ignorant" used to be a fairly vague epithet, one that we often misused to describe someone who disagreed with us. Today, because it represents a choice, the intentional act of not-knowing, I think it carries a lot more weight.
The more I think about this, the more I'm aware of just how ignorant I've chosen to be. Not a happy thought, but a useful wake-up call.