http://www.breakingnews.ie/world/microsoft-founder-targeted-in-fraud-545138.html
You'll generally hear people say that it's perfectly fine to give out your bank account number, that nobody can take money out of your account with just the bank account number. And it's true, theoretically.
The problem is that access to your bank account is controlled by people. And people are idiots.
The most successful "hackers" all share one trait - Most of their "hacks" were done without computers. Many of them barely even know how to turn on a computer. Social engineering is the main way that people get access to your data and your money.
If you've ever had a pretty girl ask you for something like your seat or a drink, or anything which you would tell a guy to go jump for, that's social engineering. It's exploiting people's weaknesses and natures to get your way. Every single one of us has been exploited in this way at some point or another, although not necessarily by someone who was malicious or who knew what they were doing.
You can have all the passwords that you like, your bank can trumpet all the security protocols that it likes. But one day there'll be a horny 20-something guy sitting at the computer and a eyelash-fluttering hottie at the window saying, "Oh, I forgot my PIN number, I'm such a bimbo, teehee. Look, here's a letter with my name on it, and my number <sly wink>, I just need €200 to go shopping".
Shred your data. In fact, burn it if you can. You know that once every five years event where you go through all of your files and throw out the old stuff? There's somebody at a dump somewhere going through the rubbish looking for exactly that and you're after giving them 5 or ten years worth of personal information along with addresses, dates of birth, spouses, children, colour hair, income, and pretty much everything they need to pretend to be you.
The most bizarre thing about people's information is that they will often kick and scream about profiling and "big brother" when a government asks for even the most basic pieces of information, but if some young guy with a "Concern" tabard and an official-looking piece of card asks for donations, they'll happily give him everything including name, address & bank account number.
Which one do you think is more likely to use your information to screw you over?