[na85]

You keep saying that "someone should have noticed something" but as the old adage goes, absence of evidence is not evidence of absence

What you seem to keep missing is that we know from the Snowden leaks that the capability already exists, and NSA has successfully used implants to do data exfil in the past.

[Qwertious]

"absence of evidence is not evidence of absence"

This isn't true. Absence of evidence is weak evidence of absence, and suggests that it's not the case.

Not disagreeing with anything else in your comment, but that quote completely defies Bayes 101.