That is troubling and I am sorry to hear that. However, many of the driveways that you removed were already tagged as private, reflecting reality. It is unlikely that bikers are trespassing due to the presence of properly marked driveways on the map.

I ask that you restore the driveways you deleted and add the proper access designation to them (access=private) if it is not already present. OpenStreetMap is not responsible for misuse of its data by downstream consumers. Please note that the absence of driveways on the map encourages armchair mappers (without local knowledge) to add the driveways again based on satellite photography without knowledge of the access restrictions, which can have the opposite of the intended effect. On the other hand, properly marked private driveways can assure bicyclists that they are not allowed on the routes without permission from the property owner. This system is set up to protect property rights while also maintaining an accurate dataset.

If you need assistance reverting the deletions in this changeset, I would oblige. If you would like additional explanation as to why we don't delete roads on private property, the OpenStreetMap Wiki is a good reference. https://wiki.openstreetmap.org/wiki/Why_we_won%27t_delete_roads_on_private_property