I agree with both of you, although you appear to be on opposite sides of the fence!
Yes, the public deserves to know who is doing shabby work, and those who intentionally take short cuts and defraud their customers deserve to be judged and punished on the highest level, and their likeness displayed on toilet paper for all to use! That doesn't mean that every reported incidence is dishonest, and that a solution can't be found without government intervention. Why should the FBO be reported to the FAA without the opportunity to defend themselves? What proof is there that they knew about or condoned the shabby workmanship? While seemingly unlikely, the FBO itself (especially a small one) may be totally unaware and innocent, as it's possible that only one A&P or IA was at fault, and may have been defrauding the FBO as well as the customer.
If you've ever had others working for you, you know you didn't watch your employees 100% of the time, even if you had the time and could (if you do, you might as well do the work yourself, right?). If without your knowledge your employee commits a crime on your property while on the clock, you don't expect a grand jury indictment against yourself just because he worked for you.
Bill is doing the right thing in trying to resolve his differences at the lowest level, first, by contacting the FBO directly. If the results prove to be unsatisfactory, Bill can always file a complaint with any of several agencies later, including the FAA (he hasn't said he won't). We just don't know the facts here, and involving the FAA (or any other agency) without knowing the facts just might be unfair to innocent people, and therefore would be the wrong thing to do! People who own FBO's may be rich or barely making ends meet. They may be the salt of the earth or arrogant SOB's. Regardless, they are still people, and have the same rights and should be treated as well as we'd expect to be treated, whether they truly deserve it or not! An accusation alone is never proof of guilt, and is one reason why our Constitution wisely presumes innocence until guilt is proven.
If it turns out this particular FBO is owned and operated by arrogant SOB's who care about nothing but money, no matter what the "cost", then I'll join the necktie party, and I'll bring the rope (but only after a "fair" trial!)
