I noticed that my in-laws 13-year old kid spends all his time glued to their iMac. I know that his user-account has parental controls enabled, and his computer-time is limited. I talked with him about it, and he mentioned that "Those time-limits are useless, since I can easily bypass them". He wouldn't tell me how he does it, though. So, how could he bypass the controls? I'm asking because I would like to be able to plug that hole (if possible), so he would do something else than sit by the computer all the time. "Discussing" the matter with a frigging 13-year old who thinks he knows everything is next to useless. Alternatively: is there a third-party parenting-app that would offer more robust features that the OS X built-in toold do?