[Uberphallus]

One can easily attach a long tele lens to one of these cameras, so one could capture passwords through windows. Specialized IR lenses are expensive, but regular lenses can do a good enough job.

Edit: my bad IR doesn't go through most glass material. Still, laptops are commonly used in public, and through lenses or otherwise, your password can be leaked. That's worrying enough to stop the "physical access means total access" adagio in this thread.

[_trampeltier]

Good IR tele lenses are not just expensive, the don't even have prices, they have "phone numbers". So you would have to get money from really a lot of people just to pay they IR camera and the lenses.

[Uberphallus]

https://www.amazon.com/Fluke-FLK-LENS-4XTELE2-4X-Telephoto-T...

Basically double that of high end SLR lenses.

[dharma1]

Thermal cameras don't really work through glass