In January, a bouquet of brightly colored helium balloons appeared above a Silver Lake bungalow.
Soon, artist Anne Hars affixed more balloons to the rooftops and gates of homes in MacArthur Park and Angelino Heights. Her goal was to invoke "Up," the 2009 animated film about an elderly man whose home is enveloped by development until one day he gathers so many balloons that his home takes flight.
The homes targeted by Hars all have one thing in common: Developers want to tear them down and build small-lot complexes in their place.
And the balloons are Hars' protest against those projects.
Los Angeles is debating the...