Certain refrigerators made by General Electric in the US <https://www.theregister.com/2020/06/13/ge_refrigerator_drm_keeps_turning/> have an RFID chip in their water filters to ensure that you only replace them with genuine GE parts. People have figured out how to hack this so cheaper third-party replacement filters will work, and now there is a website explaining the procedure. Quote: The GE website suggests that a water filter is a good idea to avoid exposure to unfiltered water and sediment, inadvertently offering a sad commentary on public water infrastructure and government funding priorities. I wonder how the lead levels are in the Flint, Michigan water supply these days ...