I think it is important to have laws about stuff like this to be honest Violet. Lots of people 'think' they are good, responsible, pet owners (not saying that you are one of these), but they just are not. I agree with what Barb said, no one could take care of more than 2 or 3 of each properly and give them all the love they need. Plus would it not be far too expensive - annual vaccinations, vet checks, food, etc.
Is this something new in the US, we've always been limited on these things in Australia - then I think our laws regarding pets are alot stricter, after I saw the Oprah puppy mill show - that was horrific - there is no way anyone would not end up in jail for something like that here.