1. They're bored out of their minds.
2. They have ridiculously inflated senses of self-worth.
Combine these two, and you get a person who has accomplished absolutely nothing of any consequence in life ... and yet demands to be heard as if he/she is authoritative and all-knowing.
Their outrage stems from the fact that nobody with an IQ over 80 would ever listen to stunted misfits like this.
Plus the walk around all day with a iPhone in their hand listening to other dimwits on Facebook and Twitter.
The worst are the ones that do not work. They have nothing better to do.