The perpetrator of the graffiti will be documented extensively, so while this might happen at first, when people realize it's a risky path to legal problems it'll probably die down.
SF: where you can vandalize police cars for 3 years, get booked 3 times, and keep doing it. Waymo cars are an easy target: you know they won't drive off or run you over.
You also assume the SF police force will bother hunting down the perp even with a picture for a crime which likely will go unpunished in SF with its effective decriminalization of petty theft & crime.
Didn't Sony/Nikon/Fuji go through a scandal a decade or two ago where a camera's infrared-based, low-light enhancer was effectively taking nudes of fully-clothed subjects? All clothing is semi-transparent to IR, to varying levels. A mask may not be an effective way to hide your face from a sensitive IR receptor.
Edit: the camera model was a Sony[1] handycam, sold in 1998. It had a "NightShot" mode that removed the IR filter - activating this mode in daylight effectively enabled "X-Ray" vision.
1. http://www.aparchive.com/metadata/youtube/ad99e1a3930185817a...