Good observation.
It is not always an option in the UK, but where you can, keeping the car in the garage is one solution when at home.
They seem to need to be able to receive a signal from the comfort access key. According to the article their device is foiled by metal. So keeping one's car key in a metal box at home might be a quick answer. It also solves the "Where are my bloody keys" search that seems to happen each morning
Because of RFID scanners, I keep enabled cards in foil sleeves. Recently, I have found that some cards are shipped in them.