And herein lies the "problem". As long as passengers are permitted to print their own boarding passes outside of an airport, TSA will have a problem determining if the boarding pass is legitimate. Since TSA relies on the boarding pass to determine positive (PreCheck) or negative (SSSS) eligibility for screening, this is going to be an inherent flaw in the system.

I wonder if the "solution" to this is going to be a regression to the bad old days when you had to line up at the airline ticket counter to get a boarding pass issued ...