if there is a system that decodes light signals into something then likely the decoder could be popped. I've wondered this about radio signals, because airgapped and interesting netwotks listen to radio but generally do not have optical listeners...

if you look at cameras, what is being done with the signal.

people already thwart image recognition using weird patterns. in a way that is hacking using light..

thus any visual reasoning system is currently being attacked using light as that is what it perceives.