"Private Road"? nope, not enough.
Private Road, eh? OK, so there's a sign. Bully for them. If they don't want visitors, where's the armed private security, the chain-link fences, Rottweilers, and so on to prevent access to uninvited guests?
Over here in the UK, "Private Road" means that the road has not been 'adopted' by the local authority or Highways Agency, and that all maintenance costs are borne by the residents. It also tends to mean that there are gates - there are five private estates within a few miles of where I live, and all of these have gate facilities, not that they're used often. one of them, even though they fitted it with road humps (a 'traffic calming' measure, is still used as a short cut, and still they don't close the gates.
So, I again ask: If they didn't want folks driving around their estate or road, where the heck were the gates?
When all's said and done, I think this is just a cynical exercise in getting money off a large company. I hope the judge sees it for what it is, and throws the case out.