Just in time for the trick-or-treaters comes this infographic from security company Trustwave that describes some of their recent research about IT vulnerabilities. Would you pick up a random USB drive in a parking lot and see what is on it? Or leave your desk without logging out first? Trustwave did investigations of more than 300 security breaches worldwide, and found that an overwhelming 87 percent of businesses that had been breached did not have security policies at all. And only about half of new hires get any information about security practices, according to the IT folks at these companies. That is more scary than a black cat crossing under a ladder.