By now you'll probably have seen and dismissed the latest inane viral timewasting nonsense Facebook meme.
You know the one - "Ooh, I'm going to post details of 10 concerts I attended, except I actually didn't attend one of them, and you have to figure out which one I didn't attend, and here's a trite banality about the first concert I did attend."
That sort of thing.
Well it turns out that participating in and sharing this little vignette might cost you more than your social media dignity.
It turns out, this could be valuable information to hackers (and, we stress, absolutely nobody else).
Common security questions, such as your childhood best friend or your first musical instrument, can also ask details of first or favourite concerts.