no worries, come round anytime to pick them up, and for a beer..
they arent that hard to remove..
i screwed one (didnt full tightened tho) and managed to screw it out, it's very hard to get out tho and it wasnt fully tightened..
you could get them off, very very slowly, but if you have the patience i suppose you could get them.. any thief would just say **** it and move on to the next car that doesnt have them..