- Install the Facebook app on your iPhone.
- Enable push notifications for your messages and feeds.
- Show your friend how cool the iPhone Facebook app is by letting them sign in on your phone – this is probably best done in the pub. They will no doubt have a tinker around and then sign themselves out.
- Sign yourself back in.
- Discover that you are now getting push messages from both accounts.
Oops. Not really so secure then eh?
It gets better, some people are having this problem with random accounts. Super – even more scary!