Homeschooling kids is not criminal. In fact, homeschooled kids are far better educated and socialized in many cases than public or private schooled kids.
18 kids is something I'd never personally do. I had 5 and most of them are grown and on their own now, good productive members of society.
However strange I think it is for the Duggars to have 18 kids, as long as they can take care of them and don't have to use my taxes to be on welfare to feed their kids, it's none of my business.
They seem to be raising all the kids to be polite, respectful, considerate, and productive. A far cry from a lot of parents in this country and their kids. I'd give the Duggar kids a better chance at making the world a better place than a lot of kids these days.
I am not a Christian, and so I don't feel that I can judge their religion regarding to the issue of how many kids they have and how they are being raised.
Rather, I am looking at the kids themselves and how they are turning out.
So far, they seem to be doing very well. It doesn't seem like they will end up as criminals by any means, instead I think if they continue on as they are, the kids will grow up to be really productive, positive members of society. Again, that's a hell of a lot more than anyone can say about a LOT of kids nowadays.