I had a weird experience, but it was on Exmoor.
Driving during the night, and the fog was so thick, you had to drive really slowly. I remarked to my passenger that we'd pull in and take a rest at the next layby, due to the fog, as we were making such little headway.
The next layby we arrived at was full of other cars, assumingly pulled in for the same reason.
So we carried on. About ten metres past the layby, the fog had totally disappeared and we could carry on as normal.
I thought about going back and telling all the other motorists that the fog had cleared just a few meters up the road.
Then I thought, there was no where for me to park, while I told them, and I didn't fancy walking down a line of parked cars knocking on windows. And they might have thought it was a scam to create a space for myself.
And just to keep my comment on topic, scamming would be alien to my nature.