Not sneakiest but most blatent.

My father works from home as a car dealer and always made a point of keeping his gates closed and only having two maybe three cars parked on the road. Just past his house was land that was sold and a small estate was built for upmarket properties about 18 years later. On the first week of moving in one of the new neighbours started complaining then got the local council and other neighbours involved because of the cars in the garden. After year's of council investigations etc it was deemed that my father could only have 6 cars on his land so his answer was ‘if they didn't like my cars in my garden I'll park them outside their houses ‘and parked a 25 year old camper that was rotten and a 1950s land rover outside the main protagonists house for about three years, making sure to put another vehicle in place while one was getting it's yearly MOT then putting it back.

That man had a for sale sign up on his house for years and couldn't sell it.