In reply to djwilse:
I wouldn't be the least bit concerned about having relatively common factory alloys nicked for the wheels or the tyres but I live somewhere fairly low crime. That said, I know someone living nearby with a bog standard VW van who's wheel studs were all loosened, probably as a result of a disturbed theft attempt rather than an attack so it does still happen.
If I had custom wheels or rarer factory fit units I'd worry more.
Locking nuts can generally be removed pretty easily with universal tools anyway.
The 'point' of alloy wheels on a road car is they look nice, on a racer they can save weight and double as a heat sink.
jk