Good news boys, here in Michigan where I am the AHJ, I do pay very close attention to complaints from by homeowners and contractors.
I work along a bordering state that does not require licensing for electrician and I do run into these guys coming into the area working for homeowners that do not know the code or their work is very poor taking advantage of the homeowner. To tell the truth, I thrive on catching these fly by nighters, and I do prosecute them.
The local contractors know this, and most back me on this since it does help their workload down the road.
Doug