you would notice everything else not working as well Assuming that my toaster didn't get owned on day 1, even as a tech-minded person, if my wifi suddenly star

you would notice everything else not working as well Assuming that my toaster didn't get owned on day 1, even as a tech-minded person, if my wifi suddenly started slowing down, I'd be considering a number of other alternatives before wondering whether my toaster had been hacked. Let's assume a little bit of packet-sniffing would uncover the cause, that's still only a very small minority of people with the skills and tools to go through that process.