It's far better concentrating that effort on something constructive like reading a book or taking part in a creative hobby. Social media is a time suck... I would go so far as describing it as a scourge on humanity.

Then, after you have a contentious public debate with someone you barely know, your actual friends and acquaintances on FB are repeatedly encouraged to go read the exchange. And since you were talking to that person so much, FB's algorithm reasons it means you must like them a lot, so your news feed starts telling you about everything the person you were arguing with is doing.