I started writing a long post about why I did this, but I realized it's the same drivel that you've read everywhere else. So, instead, I'll just drop some bullet points.
I have already deleted the majority of my accounts. I am deleting Facebook 2 days from this post.
At the end of the day, all I'd really have to do is delete Facebook, and 90% of the problem would go away, but I decided to limit possible chances of replacing one thing with the other. Anyway, this should be an interesting change. I hope when I have thoughts of signing up again, I will remember the reasons I deleted.