I recently had my F150 broken into and was told about a locking mechanism that attaches to the wing window. I was going to screw them shut but would prefer an option where I could still open the wings.
I did a forum search and found someone who mentions the locks but not where to get them.
The average car thief will not let locks get into his way. If he wants to get in he will just break the glass. A friend of mine has spent hundreds of dollars trying to burglar proof his truck to no avail.