I think you’re assuming too much from the description. In order to be evil, when it’s chirping, the chirps are many minutes apart, not continuous.
If you're relying on sight to find it, then it's irrelevant whether it makes a sound.
If you're relying on sound, you're impeded by the infrequent occurrence. That's would still be the case if the chirping went on with the lights on.
If the chirping requires near total darkness, because then to search by sound you have to go through the trouble of covering the windows (with something more than the blinds or curtains, if there are any) or else you're restricted too searching by sound only in the night hours, and doing a visual sweep by day or lamplight.
(But then the device only chirps in near total darkness, it may be defeated by a relatively dim night light.)
It gets hard when there is more than one.
The problem with identifying it by ear is that you get already some 20-30 cm precision at best unless you've trained in echolocation like some blind people. For such a small device it could well be a whole room.
Shut it all down guys, kazinator will take over from here.
He's just saying it's not that hard to determine the location of a chirping sound.
Not whether it's funny or not.