Fracking near minor fault lines apparently has the distinct
possibility of turning them into active fault lines.
++++++++++++++++++++++++++++
One could reason that if a fault line became active sooner than natural
forces would cause, that the resulting quake would release the energy
sooner, and be less severe than the natural, later quake.

But really, are there _any_ documented, proven cases of fracking causing a
quake?

I do not know of any negative results due to fracking in Ohio when I lived
there.

The waste water from drilling operations, and the proper cleanup of the area
after drilling was sometimes an issue when those corners were cut.

-- Jim in NC