While no fan of the way TSA and DHS work at times. But did anyone stop and think that perhaps, just perhaps there might be a credible threat and that with all of the xmas mailing that perhaps, just perhaps, something is being shipped with nefarious intentions. And as such those in the know are trying to prevent it getting on board an airplane. Yeah sure it is a pain in the azz but perhaps better than the alternative.
Or perhaps on that date appropriate measures will be in place to adequately screen cargo coming into the USA that may again be nefarious and may come via cargo or on a commercial airliner.
My only other comment is that at least for once it sounds proactive rather than reactive???