Originally Posted by
JonnyHK
Others have suggested similar, but using wax melted in to hold the ball bearings or even electrical solder. Difficult for an opportunist thief, but easy enough to remove with the right tools (hairdryer, soldering iron and solder sucker).
A torx driver is a lot easier and more likely for a thief to be carrying than a hair dryer or soldering iron, especially since those typically also require AC power to operate.