Originally Posted by studentff

My guess is that since escorts are not run through CAPPS, the "logical" conclusion is to assume the worst and SSSS them.

Another factor is that TSA probably wants to discourage non-pax behind the checkpoints and discourage those non-pax from bringing lots of stuff (bags, purses, etc.), and SSSS is a good deterrent for both. Prior to the recent pat down rules and the shoe obsession, SSSS for someone with no bags really wasn't that intrusive.