Moreover, what the person doesn't seem to understand is that if the kids have physical access to the computer, particularly when there is nobody around (ie: at home), any kind of lock will not work. Physical access to a machine has always, and will always, trump any security measures or restrictions you try and apply. How often do we hear about root exploits? It only takes one of those for a kid to get root on his machine, at which point he can remove whatever you have put on his machine and tell all his friends how to do it. Then some goofball administrator would slap them all down because they 'broke the rules'. Shouldn't lateral thinking and curiosity be encouraged? Are you willing to deal with that can of worms? Trying to explain to administrators that there are rules but that the ones who break them shouldn't be punished because its still educational would sure be a lot of fun. Good luck with that. :)

I agree, there is more than enough incoming solar radiation to take care of all our energy needs. There would still be a place for nuclear generators (ie: submarines, aircraft carriers, etc...) but for the most part the household, commercial and industrial power loads could be taken care of. These account for most of our energy needs so all we would need to figure out is how to deal with vehicles. Solar airplanes have been extensively developed, electric cars could be plugged into a solar grid and the rest could be taken care of by small nuclear generators supplemented by solar and wind systems. Come on, this isn't rocket sciences... Oh, yeah, rockets. We'd have to figure something out for those too... Magnetic launch system anyone? http://spacemonitor.blogspot.com/2007/03/magnetic-launch-system.html