Very easily! And could certainly happen accidentally. I live in spread out suburbs, so my radio spectrum is pretty clear. It might be an issue in a verticall

Very easily! And could certainly happen accidentally. I live in spread out suburbs, so my radio spectrum is pretty clear. It might be an issue in a vertically-oriented city. My primary automation network is ZigBee, which does have a (mild) layer of encryption and mechanisms to prevent replay attacks. There are ZigBee buttons and remotes, but nothing cheap enough that I could put two in every room. (And I had a bunch of these remotes previously, from when I just used them with the matching outlets).