My sister-in-law and her husband have custody of their three granddaughters for this very reason. Both parents were so wrapped up in their video games that they pretty much ignored the girls. Even though daddy was in the military the girls had no medical care, no dental care, no school because it would have taken time away from the computer. SICK!
Familiar story, my son has custody of his kids too. The EX was an alcoholic who also lived on Farmville & would make the kids sit in front of the TV and NOT MOVE. Of course she did many other things, like adultery & DUI & group sex.