I guess you're missing the respondent's POV - don't put anything, ever, in facebook, because ultimately they don't give two shakes about you or anything else other than making money.
Total answer to this is if the person wasn't on facebook, none of this would have happened.
True. But that's not a realistic solution for most people. It's like saying "don't have a cell phone". I mean, you can not do it, but you're out of a lot of people's loops.
The point of the article was that these people did everything right apart from that. They DIDN'T put anything on Facebook. They were added to a group without their approval.
Well, that could be the "answer" to every situation where someone got victimized. Participating in society of course opens you up to the possibility of being victimized.
How is the answer "don't participate in society" instead of "make society a better place?"
Total answer to this is if the person wasn't on facebook, none of this would have happened.