In 1978, Mark Gubin painted "Welcome to Cleveland" on his roof. He lives in Milwaukee.

Trolling is a menace, but when done right, it's also a form of art. And Mark Gubin is an artist… literally.

The 72-year-old retired photographer has lived in an enormous art space in Milwaukee since the 70s. His home is actually a former movie theater – he lives in the balcony, and uses the rest for art projects. Back in 1978, a friend pointed out that the building was perfectly positioned under the flight path for planes landing at Mitchell Airport. She said it would be nice to paint a sign welcoming visitors to Milwaukee. Gubin had a better idea.

Sources: The Milwaukee Journal Sentinel