When it comes to abuse of trust, I'm worried about goods coming from China. Israel's compromise of the pager supply chain shows that innocuous seeming devices can be weaponized via trust.

Imagine if every IoT appliance decided to burn down/self destruct and every phone with satellite connectivity decided to weaponize its battery pack. If every car with cell service connectivity decided to accelerate with brakes disabled at once. If every access point/router decided to make itself inoperable/turned into a bot net removing home internet all at once and likely shifting traffic to cell towers which could overload them resulting in zero communication. Imagine that as many devices as possible were programmed or constructed in a way to create failure on a specific date or period.

Sounds insane, but I would have said the pager thing sounds insane too. All those things definitely sounds possible to me.