Video Games and their relationship to desensitization and obesity

On many levels, the readings and classmates blogs for this course have really allowed me to see the benefits of some video games. The last few readings have made me start to think about video games and class structure and how/if they intertwine. This reading is stating that studies show that there is a direct correlation between obesity and video games. Do children play video games because they are not accepted socially or are they not in the social mainstream because they are gamers and therefore don't circulate amongst their peers? I would have found it helpful if the studies also followed the diet of these children, and their socio-economic status. Do children who have no parental supervision, poor diets, and no opportunity to participate in sports (for a variety of reasons), spend a lot of time on video games for lack of anything else to do? I feel strongly that parental involvement shapes a child, but it has to begin from the earliest stages.
I feel video games alone cannot desensitize a child into thinking crime is acceptable - a child's values are built over a period of time in a loving, caring environment. Children are not afforded the opportunity to have a simple life. As an educator, I can clearly see the children who have close relationships with their families and they are thriving because of this. I realize that due to the "stuff" of life, people get busy and our priorities go astray but if parents invest in their children's lives, a lot of what is going on in our communities would not be happening.