Scott's prompt: "What really makes you angry about the world?"

Oh dear...just one thing?  Narrowing it down to one thing is certainly asking a lot.
Several things push my buttons:

Stupid drivers on the road.  How did some of these people get a license?
Parents who seem to care less what their kids are doing when in public.  This includes that negligent group who go out with their coat on to ward off the cold and bring their toddler along without putting on his/her shoes.
Politicians.  Enough said.
People trashing out nature.
    Along with people who don't recycle.
People commenting on their Facebook post due to some screw up and not using edit to fix the post.
    Seriously.
Pressure put on women to look like the magazine covers.
The makeup industry.
The backwards thinking that porn is liberating for the women working in the industry;  not so much.
Misogyny. 

How sick is it when people like the Taliban shoot a school girl, like Malala Yousafza, just because she is getting and promoting education for girls?  Or that there are men in parts of the world that think girls are just another thing to own.  Oh, don't get me going on that one.  Righteous anger just overcomes all reason when girls are denied the basic right of being themselves because some archaic societal norm.

But the biggest problem in the world is the violence that some feel is a necessary response when they encounter others who aren't like them, disagree with them, come from a different tribe, nationality or religion, etc.  WHAT THE HELL?

No one has the right to take the life of another.  Ever.  It is that simple.