Assuming this is real, I don't see how this is legal? There's no way Tesla would win in court under any sane judge. If they bought the car outright and fully own it (i.e. didn't lease it from Tesla), then that is the car owner's property.

I'm fairly certain that it won't go before a judge. If Tesla doesn't have a forced arbitration clause https://en.wikipedia.org/wiki/Arbitration_clause in their contracts I would be truly surprised.

The manufacturer can't, effectively, sabotage your property without consequence.

I don't own a Tesla and dont have access to a US contract, but it wouldnt be far fetched that there's something in there about Tesla reserving the right to use a kill switch at their discretion.

I truly hope this is not real,

You and me both. But we live in a stupid timeline, and I can no longer tell what's outrageously real and what's rage bait.