You can, just use tamper-proof VR headsets. To defeat that you would need to sneak a camera in front of your eye. You could then protect against that by using e

You can, just use tamper-proof VR headsets. To defeat that you would need to sneak a camera in front of your eye. You could then protect against that by using eye-tracking VR and putting those cameras on double duty to detect lenses inside the headset.