This would of course be the main reason companies like Warmoth came into existence: Factory goods ain't what they oughta be, so someone decided they could do a better job.
That said, even Warmoth acknowledges you can't prevent everything, even with scientifically teted kiln-drying and seasoning techniques. Some wood just does what the hell it wants, even in the hands of master builders, no matter what your own plans might be. As an example, the Carvin neck i have installed on my Strat went all sprouty when I moved to Las Vegas last year, too, and Carvin make top-shelf stuff. Fortunately I hadn't finished the neck nor otherwise put it into service yet, so filing the sprouted ends didn't screw up a finish. Even so, I was a little put out.