It might be a good thing. There is a lot of built up stress in the San Andreas fault system right now, waiting to slip, and slip eventually it will, big time. Whether fracking would increase the magnitude, I doubt, but thereafter, smaller more frequent quakes would be a definite benefit, relieving the stress before it builds to catastrophic levels.
Over the decades since I first heard of fracking causing small quakes in the late 1960s, I've wondered if fracking plus a small underground nuclear charge could trip a quake on queue. That way, we could prepare the necessary water, fuel, and food and get people to safe locations before tripping the event. Nice idea, but who'd want that liability?
The Andreas Fault needs oiled....good reason to lubricate it!