This is something that has always bothered me, when people delete old posts or things as if they wan to pretend they never happened. Sure, it's one thing if you made a silly mistake or are embarrassed by it, but that means you should recognize why you posted it in the first place and correct it if you want to change it, not remove it from existence. Ok, this is a bad way of explaining it, so let me try again.
When I was in high school, I was really weird, hell, I've been weird my whole life. A lot of things about my past are things I find embarrassing. I was obnoxious, creepy, and just weird in general. But I also was just being myself at those times, sure at the time all I wanted was to be acknowledged as a normal person, but now I don't care. So when I look at a lot of my old drawings, I can't help but shake my head. Did I really do this? What was I thinking?
For a while, I wanted to delete all those old posts, or at least hide them, but I never did. As embarrassing as those things are, that was still who I was. That was still me. It's not who I am now, but it is still a part of me, it is one of many aspects of myself that helped develop the person I am today. And I will be saying the same thing about myself in a year or so. I am always changing, and just because I'm changing doesn't mean I should be ashamed of where I came from.
If I were to delete all my old posts, I would be betraying the memory they represent, and I would be betraying who I was at the time, so I would be betraying myself.
Just because something represents something different that what you are now, doesn't mean you can't still show it off as a representation of your life at the time?
So I have a big problem with people who do that. But I also have a bigger problem with people who think they can just block out all the things that upset them, and that includes people. This is mostly relevant to Facebook and other places like that, and I can understand if you block someone if they are legitimately harassing you. But just because someone has a differing opinion on something or posts something that offends you, doesn't mean you should completely block them from existence. Even if their opinion is bad or wrong, they don't deserve to be shunned. Internet fights are a huge pain and more often then not, they go nowhere, but removing someone's ability to respond just ends the conflict, it doesn't solve it. Take that to mean what you will. I keep a lot of people on my friends list who post a ridiculous amount of offensive things, and sure, I get upset at them, but I never block them because they said something I didn't like. People get a little too upset and act in very petty ways on the Internet, for many reasons that I don't have the ability to fully explain to you. (And I feel the same way about defriending someone).
I'm also one of those people who doesn't post every aspect of their lives on the Internet, so it really doesn't matter to me.
Ok, I'm getting off the soapbox now.