Relay attacks are very effective for stealing cars, but I see zero evidence to show one was used in this case or not. Unless you are personally the thief, I doubt you do either.
I see the word 'think' in the article, so... Evidence or GTFO.
You're going to give yourself a headache if you check codes all the time. There's a million little faults that trigger on and off.
That particular one is something with air conditioning. If AC is cold, there's nothing to worry about. Only check for codes if you get a CEL or you're gonna go nuts.