Facebook is fascinating application that is part of a suite of transformative social technologies. It's a great way to share thoughts, feelings, moments, memories, and knee-jerk reactions. However, as well-designed as it is for ingesting that content, it's not so good at letting you clear it out. Some might argue that Facebook is actually well-designed to make it hard to clear things out, because it would certainly be easy for them to code mass deletion tools, given the remarkable development skill they have demonstrated.
Some folks put a LOT of information into Facebook. And there are a host of reasons they may want to turn back the clock on that decision and clean some things out. For me, I just like to keep the amount of info cluttering up my timeline as lean as possible.
Good news, I like solving technical problems. So, follow me down the rabbit hole of cleaning out your Facebook activity and maybe Arnie will be able to tell you, "Relax, you've been erased".