Everyone gets angry from time to time. Everyone also screams out to nobody in particular about whatever they're angry about. Being someone, and hence a part of everyone, I do this too. But, you see, I tend to write mine down (or type them out, as the case may be), and so they are preserved for posterity. Because you know that when the aliens come with their giant robots and enslave humanity in a bloody war, the thing that they and the scattered survivors of the human race are going to be most interested in are what I've ranted about. And so they'll build a new society based on my words, and they'll look for me to be their new god-king, except they won't find me, because I'll have been liquefied (along with four and a half billion other people) into a nutritious protein goo that is used to feed the enslaved humans.