I'll take my chances on that happening. I doubt the screeners could pick the screenees they screened 10 minutes ago out of a line up, much less 2 hours prior. Hell, those screeners are probably on break by then.

As I stated, if one is paranoid, one can destroy the SSSS-free BP. Evidence gone.
As for the DM card with SSSS issued outside the checkpoint, some airports do not do anything with SSSS since they do not have a selectee lane. What airport were you flying out of?
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"Give me Liberty or give me Death." - Patrick Henry