It's a transistor, for switching parts on or off. It's either for a feature your not using, or in parallel with the other 3 for extra current capacity. In the second case it's possible it breaks in the future, perhaps try checking if they get hot when it's running.
That just pushes the heat production down the chain: Take a light: it converts electricity into electromagnetic waves. Those waves the get converted into heat when they hit things.
He's already shown he's willing to interfere with and straight up ignore the results of an electron. He's also willing to use the army as his personal goon squad, and has has support from the other branches. He's also perfectly capable of spinning a narrative that the election was "stolen"
On the other hand, properly executing a coup is hard, and also old: It's entirely possible he dies in office. (of natural causes or otherwise)
Not directly. That electricity is converted to heat when it's used: All devices are space heaters, some just do other things as well. Even if not used, it would still be converted to heat by the panels. There's no getting around the conservation of energy.
In theory, we could send that power out into space as microwaves or light, but in practice the effect would be negligible. The direct heat output of every human activity is nothing compared to the sun: All the electricity generated on earth is around 3 Terrawatts, while the sun hits us with 200 Pettawatts, 66 thousand times more.
On the other hand, burning fuels releases gasses like CO2, which can traps sunlight and creates thousands of times more heat than the actual amount of power generated. If we stopped burning fuel, it would stop the current massive increase in global temperature, which would then slowly be reversed by things like the carbonate-silicate cycle.
A lot of these use strong bases, like sodium hydroxide, that will dissolve fats and proteins but leave most metals and plastics unharmed. (except aluminum)
There's no way to check the whole thing, but you can totally pick a component and reverse engineer it, which is something people do quite a bit. When spying is found, it's usually a private company doing it.
The NSA doesn't care about your search history, but advertisers do. (and the government ever did, they'll just call up google)
No, that's a safety feature. It's like saying that behind every fire there's an architect that installed fire alarms for this very occasion. Without red LEDs, people will have no way to know the robot turned evil.
Sounds like a great reason not to bother worrying about it to me.