The reason you may not have run into this type of family is that they do not go into homeschooling willingly, but as a last resort. The ones that I know personally are being homeschooled in the very loosest sense of the word, and would be unlikely to be members of a homeschooling group. These types of kids generally return to the school system after their 1 year out.
I can't really say if it is a wide-spread practice. I work in a school with about 500 kids and maybe 1 gets expelled every 2 - 3 years. Our county is rural and small. I know that in a large county such as Fairfax, VA there are several alternative schools for middle schoolers and for those without IEP's.
If I find any published data on how many have gone from public schooling to homeschooling as a result of expulsion,, I'll send you a link.
BTW, I read some of the comments on your article. You make great arguments for homeschooling without resorting to name-calling or innuendos, something I notice others on that board used in comments to you. Embarrassing. Every kid and every family has individual needs. It is not up to me to say "your child should..." or "you should..." You are a reasonable adult, and obviously intelligent. Your choices are going to be right for you and I respect your decisions.
Thank you for the information regarding expelled homeschoolers, as well as for the compliments regarding my “debate” at the linked site.
Homeschooling isn’t for every parent or every child. One of the greatest fears is failure - because it harms your son or daughter. But success is the sweetest feeling in the world.