I know this is an old thread, but...
Last Saturday I returned from my ride only to find that someone had jacked my THULE T2 Pro XT rack.
It had been a very nice ride, from Ventura to Santa Barbara, some hills, some ocean and even a vintage car show in Carpinteria.
It sucked to get back to your car and find the rack gone, but at least they didn’t break into the car itself.
The locking mechanism is rather flimsy and even a fifth grader, with a paper clip, can defeat it.
The KUAT’s hitch pin lock system seems to be a more secure option.
Gonna get me a Woody and not use a bike rack anymore.
