I spotted this sign in the tiny village Henningsvær in the Lofoten part of northern Norway, in mid August. During the summer months, this place is absolutely crawling with tourists, and many will park anywhere without consideration to the locals. This local obviously got fed up, but I'm glad they added the smiley face; it kind of takes the edge off and adds some humor to the frustration :-)
And anyway, there was a large parking lot for tourists, with spaces for cars, camper vans and busses only a few hundred meters from this spot.
More signs here