The last time I really played with the machines they were locked down quite well. Sure you can play to your hearts content but there is not a whole lot of damag

The last time I really played with the machines they were locked down quite well. Sure you can play to your hearts content but there is not a whole lot of damage that you can do. Also, when required they can re-install the machines using a network boot with an ready made image. Pretty much the same way that they rebuild customer machines (if you ever get a reinstall at the genius bar they no longer grab an external hard drive or DVD, they simply plug it into a network cable and network boot it, they then select from a list of options and the re-install happens automatically from there... pretty slick system (BTW, that is how they have all of their diagnostics tools available as well).