Not a darn thing as far as I'm concerned. I have a friend whose parents threw him out onto the streets when they found out he was gay.
Time passes on and he manages to make it through high school and college through the support of a supportive foster family and now has a well paying job.
In the meantime,his parents lost their home and tried getting help from a son they disowned after telling him he was an abomonation. He turned them down cold and rightfully so.
You can abuse,neglect and disown your children but karma is a bitch.