In Germany, using shock collars on dogs is even verboten.

The account is not directly required, but you have a very hard time using an Android smartphone without a Google account. It's a bit easier with Apple, however both have in common that the apps required for eIDAS are available in their app stores – and they are not usable without an account (for common users).

It's an account requirement in a roundabout way.

Fairphone actually does this. My FP3+ displays a red bar with an open padlock as long as the bootloader is unlocked, and when one changes the bootloader lock one way or the other, the phone wipes itself.

This. The German government issues electronic IDs which can provide proof of age in a privacy-saving way, but I've never seen that being used in the wild.

Hewlett Packard had a lifetime warranty on their network gear back in the day.

So, do you like this? I do.

These 0.21/day are MPESA transaction fees. I stumbled upon that, too.

Well, to get started you could buy one of these:

https://www.reiner-sct.com/en/produkt/reiner-sct-authenticat...

… and then decide whether you really want to get into electronics development.

Is there an exploit? I've always wanted to explore the inner workings of my car's computer system, but I don't know how.

I recently read "The car hacker's handbook". It seemed to explain the basics very well and pointed me to all the necessary software and hardware to get started.

It is an interesting topic for sure.

That book looks very promising. Thanks a bunch!

Look up OBD-II.

The cars I know lock their doors automatically when they go at a certain speed (e. g. mine does at 20 km/h). Doesn't yours?

It does. But that isn't what I want it to do. I want to manually lock the doors as soon as I close my driver side door.

Does it work better when you use the key fob from inside the car? I would expect that because they surely tested a "unlocked accidentally and locked again right away" kind of scenario.

At least on ours, it tries to maintain the invariant that all doors lock at once (for aesthetics?), so you cannot lock anything if any door is open. It also likes to auto-unlock, but not auto-lock when you’re outside the car.

If two people lock it at the same time, it locks, then unlocks.

The smart lock stuff on it is even worse. I didn’t think it was possible to screw up car door locks so badly, even knowing Tesla’s implementation burns people to death sometimes.