This probe is ridiculous, in my opinion. If I were a man, I’d surmise that it has nothing to do with customers complaints, but more to do about how to get its claws into Apple, specifically, on its money.
Paranoid? This is just a preliminary request for information with respect to U.S. securities laws compliance. Public companies get these all of the time (believe me, I know, having responded to many of them). Something may or may not come of it, but you can rest assured that Apple will be competently represented throughout the entire process. Just my humble opinion, but to me, I would bet your stance would be different if the subject of the inquiry was Google, rather than Apple, n'est pas?
You're right. I "clearly" don't know you, but will continue to question why you would find a securities regulator's routine preliminary inquiry "ridiculous". In my book, that's called "doing one's job".