So, where are the posters that say you can't possibly control what your child does?
There are ways to limit how much time that someone is able to use the computer per day, even a few software programs for those parents who can't figure out to just steal the cpu / ram / power cable until they get home. The fact that the parents had no idea that 11 hours per day was over-the-top for a 12 year old, is pretty fucked up.