That doesn't look to me to be much of a security lock.
Reminds me of a Mitch Hedberg bit:
I rent a lot of cars, you know, 'cause I go on the road. I rent cars and when I drive a rental car, I don't know what's going on with it, right? So a lot of times I drive, like, for ten miles with the emergency brake on. That doesn't say a lot for me, but it really doesn't say a lot for the "emergency brake." It's really not an "emergency brake", it's an "emergency make-the-car-smell-funny lever."