Why it matters
A compromised camera or plug is rarely the target — it is the foothold. From there an attacker sits on the same network as everything you actually care about.
The two-step fix
Put smart devices on a guest or IoT network, separate from computers and phones. Then let the fleet inventory what is actually connected — most households find devices they had forgotten existed.
Takeaway. Segmentation costs nothing and removes most of the risk of cheap hardware.