Nor do they love science. Most of the things they post are not accurate. The picture of the universe and a synapse for example springs to mind. They are just a "Like" farm. They use their tracking of likes to mine relationships so you can get personalized spam that appears that it came from your friends.
I think we should relax about the idea that most people post inaccurate facts when they're cheering science. What they're doing is cheering for the idea of science. It's similar to people cheering at a basketball game. They're not basketball players, so most of what they have to say about the topic is going to be wrong. But they're still rooting for you, and this is a good and powerful thing.
... until they have a gross misunderstanding of an issue relevant to public policy and spread that misunderstanding to others.
There is no "good ignorance".