That makes sense Simon!
I could see how that could come about, and I guess everyone definitely doesn't keep good records. That's unfortunate, though. This is my first year to be expecting any offspring, and I am already doing quite a bit of record keeping. I want to be able to track all of my babies' heritage...especially the ones I decide to keep. I keep extensive records on all of my snakes...when they eat, poop, shed, etc. It's time consuming, but well worth the knowledge. It lets me know when something changes or when one of my snakes might be sick.
To be honest, we (my daughter and I) have been considering breeding our cal kings to our corns, but now I am leaning toward changing my mind. Your reasoning and explanation of why you are against hybrids, has pushed me a little more in that direction. I'll will give the matter serious consideration before making a final decision!
Lisa - I don't think you would know if you bought a corn snake at a petstore. Most petstores don't care about where the snakes actually come from. There is one petstore near me that is very good about stuff like that, but most of them aren't!