With sufficiently high-frequency gyroscope data, it is possible to infer what a user types in with moderate precision. In some cases, it has even been shown to

With sufficiently high-frequency gyroscope data, it is possible to infer what a user types in with moderate precision. In some cases, it has even been shown to be possible to recover coarse audio data from the surrounding environment. https://bugs.chromium.org/p/chromium/issues/detail?id=421691 https://bugs.chromium.org/p/chromium/issues/detail?id=421691 Browsers have added rate limiting to mitigate this threat. (Prior to that, my former team in Google Ads added our own rate limiting to the gyroscope API we provided for ads.) The risk now seems pretty minor, but I wouldn't be shocked if someone clever still managed to find some way to abuse it.