> To violate your privacy an IR sensor would have to be able to pick out people (98 degrees Fahrenheit, approx.) and put them on a map.
People aren't the only (or largest hotter-than-background, and maybe not hottest-human-sized) thing on your property that a privacy-violating IR sensor drone might want to detect.
> Versus a sensor tuned to an actual fire which is substantially hotter and larger.
If you want an early-detection sensor for fires, they'll be substantially hotter but not substantially larger than an adult human.
People aren't the only (or largest hotter-than-background, and maybe not hottest-human-sized) thing on your property that a privacy-violating IR sensor drone might want to detect.
> Versus a sensor tuned to an actual fire which is substantially hotter and larger.
If you want an early-detection sensor for fires, they'll be substantially hotter but not substantially larger than an adult human.