I am so sorry that you are getting these harassing phone calls. Some people are just really SAD and PATHETIC.
If I were you, I would have the numbers blocked. NO ONE has a right to call you and slam you or bad mouth you just because they don't like something that you are doing (and it sounds like these people don't even "KNOW" you - so who in the heck are THEY to judge!)
Anyway, I don't really have any wonderful advice for you or anything...but I can tell you that if you love your babies, and they are being well taken care of, then that is all that matters here
There ARE going to be people you come across in life that totally disagree with the way you do things as far as breeding goes...but that will never change. I say that as long as you aren't breeding females that are 2 and 3 lbs, and as long as your dogs are vet checked and are healthy, then there is nothing wrong with being a "small hobby breeder".
You just worry about YOU...let everyone else think and say what they want