You are confusing injection disposal wells with fracking. Get your facts straight.
I'm comparing injecting liquid at high pressure deep underground to injecting liquid at high pressure deep underground. The ultimate purpose is different in both cases, but the activity and consequences are quite similar. If you want to expound on the differences, and why the earthquakes have risen twenty-fold in Oklahoma and other fracking sites, I'm genuinely interested.
I carry no preconceived notions into this discussion, and merely sought to share with the poster information he was clearly unaware of.