Worrying if it is vandals - is your car 'getatable' when you aren't using it?
Had a worrying experience on similar lines once about 50 years ago. I drove an Anglia, had a bad puncture, and had the tyre replaced at a garage somewhere out in the wilds of Hampshire. Drove away and after a few miles could hear a rattling sort of noise. Investigated and found that the offside front wheel was the culprit - the one with the new tyre. The Anglia's wheels had hub caps - removed the cap and three of the four wheel nuts fell into the road. The wheel was being held on by just one nut. Replaced them - it was too late to go back to the garage to moan, and it was miles out of my normal areas, so I chalked it down to experience.
Mike