When people have cables with combination locks for securing their laptops at their workstation, they always remember to turn the tumblers when they secure the laptop. But what happens when they unsecure the laptop?
Many people won't turn the tumblers on the opened lock because it is much easier to lock the laptop later if the combination is already set. About half a dozen laptops in our office disappeared one day.
The laptops were stolen by someone who came by when the laptops were not there and noted the combination. They came back later when the laptops were there and used the combination they had noted earlier.
Source: http://www.sans.org/tip_of_the_day.php#72
