Putting myself in the shoes of a qa for a second...
What is the cheapest way for me to trigger a false positive on such a detection device?
And what can we do about it?
Rinse and repeat until the cheapest cost exceeds a standard pair of smart glasses.
Bluetooth packets similar to smart glasses and IR filters used by a popular brand should probably be enough.
Before putting yourself in the mind of QA, you have to be 100% sure on what the goals and priorities of the product is supposed to be in the first place.
Only a subset of use potential cases will be worried with false positives, but this approach says to drive the cost greater for all potential use cases.