At first I stopped in from time to time to get my outrage on (I never interact with them, just read) and to feel smug that I am intellectually superior to them and their followers.
But then I realized that if way back, at the very beginning of your thought process you start from a false premise, everything else can follow reasonable and logical methods. It's almost like chaos theory, small differences in the starting position can have vastly outsized differences at the end.
I've used this experience to go back and look at my "starting" positions. And I've horrified myself too. So on the whole it's been an enlightening experience.
So now I can say that I am firmly on my way to understanding them now (and myself too) even though I diagram with them vehemently.
I don't use Facebook much, but if I did, I would want to be able to tell the algorithm "take 50% of what you want to show me based on my preferences and show me the exact opposite"