I live in a gated apartment complex. You have to enter a four digit code on a keypad to open the gate at night. The other night, on a whim, I tried entering 1234 instead of my own self-selected code. It actually worked! Come on people, can't you think of something a little better than that? I'm willing to bet that a large percentage of those security keypads will open with that code. Given a large enough population behind the gate, the odds of someone picking a totally lame passcode become really high. Now I find myself wondering: how many people choose 1234 as their ATM PIN?