Wheel locks are only to prevent "casual" thieves. If someone really wants your wheels they can take them. Like the old saying goes, locks are to keep honest people honest.
The fact is with that rear mounted spare tire the majority of the thefts will be those casual thieves (I call them crack heads) looking to sell the wheel/rim to get some easy cash. Where I worked a few years ago had almost evey rear mounted spare in the lot stolen within a week period until the thief got stupid and tried to steal one right by the building. They saw him and had the police come over and take him away. He was stealing them and selling them for drug money...
btw he did not steal any with wheel locks on them...
1970 Buick Electra Convertible
1994 Jeep Cherokee Sport
2002 Pontiac Bonneville SSEi
2005 Jeep Liberty Limited