I say “what” not “who”, because these “people” committing these acts are human in form only.
Take a look if you have the stomach.
Do you know how many earthquakes have shaken the earth so far in 2013?
I did a search on earthquake.usgs for the number of earthquakes so far in 2013. My search began on 01-01-2013 through 09-16-2013 for the number of earthquakes with a magnitude of 5 or more. The results: 1099 earthquakes with mag of 5 or greater. The past week shows an estimated 72 earthquakes, M 4.5+.