The Hollywood star is currently shooting the sci-fi blockbuster in Manhattan, but he hit headlines last week (ends13May11) after residents in the Soho district complained about the sizeable eyesore parked outside their homes.
The two-storey trailer, which features a cinema, a lounge bar and offices, as well as a full-sized kitchen, large bedroom and bathroom, had to be moved after Mayor Michael Bloomberg waded into the debate and demanded Smith relocate to a private car park, half a mile (0.8 kilometres) away from the movie set.
But Smith can't get his head around the scandal - because the public has never taken issue with it before.
In an interview with his former manager, Russell Simmons, on GlobalGrind.com, Smith says, "I don't really understand the controversy. Men in Black 1 and 2 and Hitch used the same trailer, in the same place. In fact, we use it every time."
And rap mogul Simmons has publicly shown his support for Smith - he's titled the blog post, 'If I Was Will Smith, I Wouldn't Move My Trailer One Inch'.