That might have made more sense if polygraph testing actually performed better than a dice roll. The US Congress Office of Technology Assessment and the National Academy of Sciences could've told DHS that, but I guess they didn't think to ask.
Or think in general.
There's a lot of things that could be included in such a program that would be useful for the general population to know both in times of war and in peace. Civil defense and emergency response. First aid, evacuation of wounded/incapacitated people from dangerous areas. Basic firefighting, shelter locations and evacuation protocols etc.