In my co-op, we have a wonderful common house with a dining room. Every meal, the room gets louder, and louder, and louder until it's a serious problem for people with sensitive hearing.
As more people talk, people choose to talk louder to be heard, which increases the volume, causing others to get louder. It's a feedback loop that only incentivizes increases in volume. So it becomes unbearable.
Reverse chronological algorithms work exactly the same way- they have no countervailing force.
That's the reason I tend to unfollow or mute people when they get too chatty.