Actually - you are ignorant of some facts. At least two separate projects to inject fluid into Geothermal hot spots have been abandoned because of quakes that were created.
http://www.popsci.com/science/article/2010-03/does-geothermal-power-cause-earthquakes
http://www.livescience.com/9777-earthquake-concerns-shake-geothermal-energy-projects.html
As well as disposal of liquid nerve agent waste at The Rocky Mountain Arsenal: “The Army discontinued use of the well in February 1966 because the fluid injection may have triggered a series of earthquakes in the area”.
OK, I did a little research and recant. I had NO idea how much stuff they pump into the ground. Wow.