In addition to blocking games based on their ESRB rating parents can also use GShield to limit the amount of time spent playing computer games. Parents can also limit games on time based on days of the week, say they don't want their child playing more then two hours on school nights but they can play eight hours on weekends, or they can turn off games all together, i.e. to enforce a grounding or drop in school grades.
These details are provided for information only. No information here is legal advice and should not be used as such.