The people that make these "jokes" or stage these "hoaxes" are very frightened people. They have neither the moral fibre or maturity to deal with the most horrible events that have happened in America.
Who does?
If you hear anyone make a joke or are witness to a hoax please say VERY loudly to the instigator, "I am really sorry that you are emotionally unable to deal with your feelings, if you want to talk about things I'm here for you. I hope you can mature in time to cope with the consequences."
Feel sorry for these people, not angry. There are others in the world that deserve your anger far more than sad immature individuals that can't understand the gravity of the situation now and the possibilities of what is to come.
Feel and express pity VERY LOUDLY, save your outrage for those that deserve it.