It has been argued that using a rifle scope is perfectly safe and OK for scanning/glassing for game, rather than using binoculars.
People should never sweep their guide or PH or other hunters in the group with the muzzle, people who are guilty of that are likely now telling others not to glass in the distance with the rifle scope....chuckle.
I use the rifle scope to glass game on vast tracts of remote area private property...If someone ends up in my lense its their problem because they are trespassing.