because planes have windows at considerable cost to design properly
It didn't occur to me until I read your comment, but at this point wouldn't a an LCD screen be better than an actual window? No window means structurally more sound. And 1080p would be better than the fogged/scratched up windows that planes have now. Quick, to the patent office.
A radio antenna then picks up very weak signals emitted by the electrons
IMHO, I think listening for electrons is a better analogy.
To quote a very stupid cop who was arguing against cameras:
"People react differently when they know they are being watched".
What this cop was too stupid to realize was, the response to his comment is:
YES! THAT'S EXACTLY WHY WE WANT THE CAMERAS.
I think he meant that cameras will also reduce the level of police engagement within a community.