Situational awareness, and/or a retention holster...
Both.
AND. Definitely and.
I always use a retention holster for OWB carry.
“or a retention holster”
Exactly. That’s the only way I’d open carry.
I don’t know what the law is in other states, but in Texas it is considered lethal force to attempt to take the gun of a police officer or security guard.
I’m not sure if this applies to licensed carry, but since security guards essentially operate no different than armed citizens, I would expect it would be the same.