I think it is important to remember that the ABCA is merely a registry - not a keeper of the breed. Sure, the ABCA has a stance on maintaining the border collies as a working breed and does not encourage breeding based on anything outside of proven working ability, but in the end the ABCA is a database.
People like to use "ABCA Registered" as an automatic stamp of approval when, in reality, there is no stamp of approval beyond proven working ability. Most border collies bred and born today simply should not be. That includes breedings from backyard breeders, puppy mills, "working parents", and yes, even the much revered "Open Trial Winner."
Unfortunately, the definition of "proven working ability" is and will continue to be bastardized by people who want to breed their dogs while maintaining that they aren't doing harm to the breed. There's nothing anybody can do about it beyond strengthening their personal definition of what exactly proves working ability. Does running well at USBCHA trials prove working ability? Not in my eyes. Does walking on the backs of sheep prove working ability? Not in my eyes. Does gathering 5 head off a 3 acre field every day prove working ability? Not in my eyes.
None of those things disprove working ability, but in my less-than-humble opinion, people who breed these dogs need to actually get out and understand what work looks like before throwing Fluffy and Muffy together. Not just see, understand.
I have a couple of pretty good dogs and have owned a few others. I also think I understand what real dog work looks like. I have yet to own a dog that meets my personal definition of breed worthy - including "open trial winners" and one that did well at the Nursery Finals and is now neutered.