There are several definitions and opinions about the definition of a backyard breeder. If you look for the word "search" on the top blue bar on this page (I think it's directly under the 'co') you can search for that term.
It will return with links to threads where the issues have been discussed in the past. It should give you a starting place. I had no idea about any of this when I found YT. Many people have no idea, so don't think you are alone.
Here's a link to a great site for information. I think when you read the info on this site, and then go back and read this thread, it will start to make more sense.
http://millbusters.com/