There are lots of service roads to properties marked on OSM, but that's beside the point. 

OS hasn't removed your driveway from their mapping, I can still see it. And I doubt they would anyway. It's a valid thing to map. Anyway, this is about OpenStreetMap. 

Changing things on OSM or OS is not going to stop people acting stupidly on your driveway. You need to stop them having access to it with gates or a chain.

I see your gardens are listed on VisitScotland and discoverscottishgardens.org. Have you discussed the problems you are having with them. Or contacted the local police for more practical  advice.

