[sandworm101]

The lockers are just so you have a place to put your phone. They are not secure in any way. Using a keyed locker just ensures you don't pick up someone else's phone by accident after the meeting. Remember that secure rooms live inside secure buildings, usually inside a secure facility with a fence and guy standing at the gate. And the guy has a gun.

[dragonwriter]

> Using a keyed locker just ensures you don't pick up someone else's phone by accident after the meeting

It also prevents casual but intentional unauthorized access, just not a determined attacker.

As you note, there are other layers of security for that.