Going down a rabbit hole (because I help coordinate control access/ campus security design at work and this is interesting to me)
If you look at the ENCOM key card IDs all the characters (and background characters) have, they do not have a bar code, it’s only their photos and name on the front. (Also, note that Ed is the only character that doesn’t wear his ID card because he’s a diva and it doesn’t match his outfit lol)