TSA defines and re-defines 'risk' every day.

"Risk" is gentle old women with wet diapers, little children, elderly war vets, folks in wheelchairs, anyone who doesn't grovel enough when called to do so, anyone with goodies properly secured, anyone with a camera or recording device, anyone who doesn't make eye contact with a BDO (kinda hard to do when you're in a toilet stall and the BDO's still grilling you), being late for your break or your hours of mandatory weekly playtime, er, training.

Conversely. "No-risk" is anyone in a TSA uniform, anyone the TSO knows personally, any camera-free zone (baggage screening?).

For many TSOs, "risk" is anything that interferes with what they want to do or how they want to do it. It has little to do with aviation security.