So we can assume it happens frequently because it is a common mistake and not an isloated incident.
If you're refering to tooth damage from giving weight-bearing bones like femurs and knuckles to chew...I would say it's a common mistake. Just as feeding crap food is a common mistake. Pleanty of people trying to do what's best for their dogs buy weight bearing bones from large animals for their pups not knowing the dangers of them. After all, they're on the shelf at the pet store, so they must be okay, right?
Plenty of people know that raw bones, or even the junk bones at wal mart have tooth and gum benefits, or they buy them to keep the dogs busy during the day, but not as many people know what bones to stay away from and what's ok. Like I said, when I started bones long ago, I was giving femurs and knuckles left and right. Luckily I learned better before having any accidents and switched to ribs, but many aren't informed enough.
Making the change from Pedigree to a quality kibble or even one step further and going raw is a process of learning more and more. Everyone starts somewhere, and for many, weight bearing bones is the start before learning more.
No one jumps into raw without researching a bit first. Someone that knows nothing about dogs and their nutritional needs is going to pic one up at the shelter, take it home, and just start giving raw meats. I'll hand it to you that you do have to know a thing or two before feeding prey model, but it's really not that complicated. One afternoon in the raw section will do the trick. I'll also hand it to you that RFD can come off as an arrogent jackass (sorry RFD!) at times, but the fact of the matter is when it comes to prey model raw, he knows it forwards, backwards, and upside down. I can definately appreciate his knowledge and experience to help me make right choices for my dogs, because I am only 20, so I definately don't have 7 years of raw experience and research under my belt. But I ALWAYS use his opinion as suggestion, and continue with my own research and what works for me and more importantly: my dogs.
You know Abady forwards, backwards, and upside down. (at least, you know their promotional material and marketing info) Where you become an unreliable source of information on YOUR diet is that you are so blindsighted by it that you just become a walking billboard, and have nothing but their promotional material to back your opinion. You push their product, and back it up only by their info. Where's the crossreferencing? How do you know any of it is true? How do you know you can trust any of it?
Show me some information that shows the quality of Abady's ingredients, that proves CBPM to be as reliable and nutrient rich as muscle meats that is NOT from Abady themselves.
As for your never-ending "my feed is superior to all" debate, lets let it go. The fact is we all have our own educated opinions on what makes a food great and what doesn't. The purpose of this forum isn't for immature debates between educated individuals with differing opinions (that will never agree, therefore making the discussions pointless). It's for people who are starting to educate themselves to seek opinions, advice, and guidence in making better decisions for their pets from people who have been doing the research for quite some time.