Inclusion of special needs children in mainstream care: ideal, or idiocy?

After many years of failing to include children with special needs in mainstream care and schooling, we now attempt to include every child, regardless of the scale of their particular difficulties. We are living in an age of political correctness, and it's an absolute taboo to suggest that inclusion of all special needs children is anything but fair, beneficial and right. I want to have a closer look at inclusion and tell you about the unintended side effects of some inclusions that I've witnessed.