Re: Problem with the iCloud theory
" All these celebs ignored those alerts?"
Almost certainly, yes.
As do very many people when they get a message on their smart-phone thingy because so many different things send you alerts all the time you get used to just clicking them all off. That is one of the problems - the systems are set up by (and for) relatively tech savvy people and that leaves a lot of room for less aware people to get ripped off.
In one sense, that is how Apple have been so successful - keeping a walled garden around their hard/software has removed the need for many people to get down and dirty with their devices. But it puts a lot of trust in the supplier and leaves people very unaware of what is really going on under the hood.