We had to get a change made to Google maps to prevent people getting killed here, and it took national news, and personal contacts within the organisation.
Something is rotten in the state of Denmark.
I think this is the right approach. Why do free ground-proofing for a for-profit company? (Who is also so unresponsive). Better to submit fixes to a community project.
A friend of mine just bought a property in regional Australia, and Maps wants to send anyone going to going to his place via forestry roads and then across two private properties to get there, despite having main road access.
Once in another part of Oz, we were sent up a cliff face, in the middle of the night, and it took an hour and a half to correct it's mistake.
Every time I try and "fix" maps by reporting it, and very very very rarely is it fixed
Another property has two "crown roads" on it, but to all purposes, they're very dangerous 4wd trails, again thru private property. The owner has signs, but the belligerent and unaware swear by the Goog, insisting it's correct.
I prefer paper maps over the Google rubbish.
Hiking in Hong Kong, Google maps disagreed with the route I was attempting to take on Sir Cecil's Ride back around the back side of the rock quarry. Google maps took us across the front face of the quarry, past the police shooting range / Explosive Ordinance Disposal Depot, and up a sheer rock face next to the quarry with the assistance of a cobbled-together rope some kind soul left for others, then through a bamboo thicket that cut my wife's legs up. My wife no longer insists on following Google maps if it disagrees with the hiking route I'm planning.
-- Manual on Uniform Traffic Control Devices, 2009 edition, section 2A.04, paragraph 01
Replace 'signs' with anything--no one's patience/attention will hold up in the face of a constant barrage of information.