@abrasive Yeah that's what I'm worried about, but also that's maybe in the realm of "I can rewrite the EDID if I plug it into a Linux device with HDMI"?
@mjg59 I have an unfortunate feeling that there's all microcontroller and no ROM on DDC nowadays - afaik HDCP negotiation runs over it (along with myriad other things like monitor control on PC-oriented monitors, perhaps some ARC negotiation, etc)