What does the law say about border staff circumventing things like password controls? Agree it's unlikely at present that there will be a good pen-tester employed at the border but... what if..
As a crap example an old Win95 lappy, they boot into command prompt and rename the *.pwl file and then login? Can't remember if that works on 95, anyway using DMA or similar to change the password. Legal / Not?
Have I just given them ideas? :-/