Traditionally when we have a situation where the masses don’t have the means, equipment or knowledge to make sure for themselves, the law & regulation steps in. This is why you can buy food at a supermarket and be reasonably certain that it’s not toxic without needing biology & chemistry degrees and an expensive lab to analyse the food.
1) are not particularly well-informed about issues around Facebook 2) aren't willing to go through the effort to be well-informed
So the real problem we need to face as a society - Facebook is only one instance of it - is how to get more people to take an interest in the important issues around them? How do we make people into competent citizens?