Fracking for Clean Energy (wait, what?)

ok, but a few quick counterpoints: 
1) The cost prohibitive part of hydro is digging the giant shaft, which this doesn't *really* help with (unless you keep it under pressure, steam can only deliver so much energy)
2) The places with the thinnest crust, most optimal for geothermal, are often the least stable, making fracking much more dangerous from a plate-tectonics point of view
3) Yes, the cracks have better exposure to the heat, but worse flow. Unlike a closed loop system, you would have to do some tricky clever pumping-in-pumping-out switching to make sure that the hot water gets out of the cracks and to where its supposed to go, right?