I feel you’re justified in worrying about accidents caused by trespassers, either vehicular or pedestrian. Your OC should consult a solicitor on:
*whether trespassers can compromise your OC’s insurance covers in any way; and
*whether trespassers would be able to sue your OC if they hurt themselves or damaged their vehicles whilst on your property. E.G. Tripped because of bad lighting and split their skull on some concrete; and
*whether trespassers could say that residents witnessed them trespassing frequently but because the OC never stopped them trespassing, that the OC has “adopted” the nuisance or continuing criminal offence and is therefore liable for trespassers hurting themselves or damaging their vehicles whilst on your property.
Trespassing shouldn’t be tolerated on any kind of property.