Are we making our own choices or just reactions to stimuli?
Imagine a moment you are a lonely nerve ending. All of the sudden something rubs against you—“are you there?” “Yes, I am here”. But it takes another to stimulate relational awareness. Without other there would be no way of identifying self existence. It is said by some that god (or the universe) would not know it is god because there is nothing outside of itself to bring it to awareness of itself.
On the other hand, identifying self by other is also as ambiguous an introspection, because what others think of you rarely adds up to what you think of you. All of us are simply reflections of our external world.
So what is the difference between commenting, hitting the like button, or just moving on? Do you have to agree to appreciate another point of view? I was accused at watchtower of trolling christian blogs. I responded that I only read two, usually hit the like button to appreciate their efforts, yet only comment occasionally if stimulated to do so. But for some the reward is bloviating what stimulation they incurred previously. That is trolling, fanaticism—a self aggrandized irritation.
You may comment or not, but that choice has already been made by the years of stimuli, or not. There may-be freewill, but it was captured in a bottle long ago the moment humans learned the art of civilization.