But Facebook remembers. Facebook remembers because I've recorded my life on it. It's one thing to have memories, it's another to have virtual evidence.
Be warned, the first time you go back to the beginning, you will feel like this:
I recently did this because I realized the description I had of myself really didn't say anything about me, but was rather a list of things that I liked, but silly things, for example, octopuses and the colour yellow. Sometimes we put silly things in other sections of About Me, like that our languages include English, Sarcasm, and Pirate.
We all have at least one badly picnik'd photo, something with a contrived pose and some sort of text that is likely something you saw someone else put on their cringe-worthy photo. Exhibit A:
No one wants to see those, least of all you, because you probably embarrassed yourself looking at them realizing how awful all of these pictures are. I know I did. Which is why I took the worst of it off of Facebook. I also browse through photos that I'm tagged in and remove the tags from any photos that I'd rather not see, such as photos where I look high as a kite because the photographer used flash, or that one where I'm mid sentence with crayon marks on my face. Sure, they're still ON Facebook, but at least they're not in "Pictures of Me" and not easily found via my profile.
Sometimes it's a confidence boost. If you come across a very flattering picture of yourself, it makes you feel good about yourself to read the positive comments that people posted. Not to mention if that jerk--who you only added because he was in your class and it seemed polite--said something nasty, one click and BOOP! the nasty comment is gone. Relive your achievements by reading comments left on posts about awards you won. I got quite the boost when I found a wall post from a girl who said her first impression of me was "Wow, she must be good at lots of things!"
It can bring some closure too. Ever clean out a drawer and find something an ex or a friend you had a falling out with gave you, be it a present or a letter? Remember how good it felt to throw it out or rip it up? Gives you a satisfied feeling of, "Well there's that gone, glad that's all done." A similar feeling can be achieved through hitting the delete button. It feels good to delete a status about a bad time you had in your life. "Glad I've moved on from that, glad that's gone."
This is why I believe you SHOULD go back in your profile. It's your Facebook profile, not your Facebook record. It's a resume of who you are now and your past experiences, not a record of everything you've ever done ever. To be fair, probably no one is going to be looking that far back, but if they do, they won't care that you had "Can we pretend that airplanes in the night sky are like shooting stars? I could really use a wish right now" as your status, but they may care about your status from when you were so proud of your team for making it to regionals and the pictures that accompany it.
On the internet you can be whomever you want to be. Might as well clean it up to show your good side and present yourself as a mature/awesome/classy/fun individual.