Hello all. I am making an exception and keeping this thread up because so far everyone is being respectful to each other. (and I greatly appreciate this and know how hard it is for some of you, because those of us in rescue or know about rescue work do know what happens to many pet store bunnies).
And as non-soapboxy as I want to be, I just have to respond to Thunder (another reason that breeding discussions are not allowed - see, see what happens! 
) Anyway, this is the only time I will make an exception from now until forever, as this may be good to use for future referencing.
My soapbox:
I also do understand that many people have no idea about what happens to many of these bunnies. (or many animals!) I know I was a person who was unaware of this less than 8 years ago. And I look back now and think, how in the world was I so unaware. But I was, so I absolutely understand how others don't understand.
Here's my story: I got my very first bunny, Forrest, from a breeder, I remember even thinking I'd bring him back to allow him to breed. Ahhhh!! I remember telling my vet this!! I cringe now. Anyway, he said....."eh, there are many many bunnies already in the world, so you may want to think about neutering him". I thought a little about it but not much, but later I did research about neutering and started coming across information that included rescue efforts.
I found out the numbers of bunnies being euthanized in shelters were staggering. Perfectly fine bunnies, many of which came from whim purchases at pet stores, and pet stores don't usually give enough information to help customers with long term care, and so baffled overwhelmed customers end up turning these bunnies into shelters. (and you don't want to know what happens to the unsold animals (Theresa touched upon it)
I began to volunteer at a rabbit rescue. The rabbit rescue saves bunnies from euthanasia at local shelters, and there is never enough room, never enough time to save them all. And most of the bunnies ready to be euthanized are perfectly fine, lovable, sweet creatures - they just happened - they just happened to be another "one too many".
After seeing first hand so many beautiful animals in need of adoption,just needing someone to care for them, someone to love them.( A "happy" life.) I couldn't contribute to bringing in more bunnies in the world. Forrest was promptly neutered before he ever was bred. WHEW!
The flip side of this is I have a friend who is breeder, and though I do not agree with breeding when there are so many unwanted animals, I respect that she teaches her customers well, and ultimately whether a bunny companion comes from a breeder, a pet store, or even a rabbit rescue, the responsibility of the animals welfare falls on the person who took the responsibility. Even people who adopt bunnies from rabbit rescues have neglected or abandoned their bunnies. But because there are just so many abandoned animals, I personally think that at least "not contributing to the cycle" is an important thing to do.
And I think teaching children about creating life is wonderful, but actually showing children about saving life can be incredible.
ADDED LATER: P.S. One of the reasons I started BinkyBunny was to help prevent someone from giving their bunny up. That sometimes having bunnies as companions is challenging, but through education, brainstorming, and helping each other out, solutions can be found.