> benchmark for future AI discussions: "how do you plan on separating data from instructions?"

Ah! Avoiding in-band signalling!

As this point, maybe we should have a discussion on why modern developers are unable to learn dangers we were aware of > 30 years ago from using 2600 Hz signalling tones over the phone.

FWIW the phone system designers were aware of that flaw but took it anyway to double the number of channels per carrier system - still a quite worthy trade-off in hindsight.