Unless there is thick fog they can just see you with their eyes.
There's security arguments for having it (i.e. confirming locking/detecting jamming) but pretending people cannot see you or otherwise hear you, but can hear a single honk isn't a realistic set of seemingly contradictory circumstances.
There's security arguments for having it (i.e. confirming locking/detecting jamming) but pretending people cannot see you or otherwise hear you, but can hear a single honk isn't a realistic set of seemingly contradictory circumstances.