I think a good idea would be to machine-read BPs and gate passes in the queue rather than use a visual check. Scan the barcode or magnetic stripe on the BP, just like at the gate. Gasp, that technology could also beep and flash a red light to indicate SSSS--thus eliminating the problem of 1) tipping off SSSS ahead of time and 2) cranky FTers who photoshop SSSS-less BPs. The technological hurdle is making either the reading technology or the BPs themselves standard in some way in terms of barcode format or mag stripe data, esp. at checkpoints serving multiple airlines or an entire airport.