Rocks Off, a Manhattan concert cruise company that promotes such acts as "Hall and Motherfuckin' Oates Tribute!" and offers bus trips to KISS and Def Leppard shows, is under fire for using an image of the crumbling Twin Towers on its site.

Spotted by DNAinfo, the partially fallen towers joined NYC landmarks like the Empire State Building, the Chrysler Building and the Statue of Liberty at the bottom of the page—along with a fish throwing up devil horns and the silhouette of a unicorn humping a dolphin—until it mysteriously disappeared after probing from the news site.

Families of 9/11 victims were understandably distressed by the tasteless artwork. "It's a disgrace and disrespectful to the families of the people who died that day," Jim Riches, whose son perished on 9/11, told the site. "These guys are trying to get money by being provocative and showing the towers blowing up and then turning around and saying let's go have a nice rock concert."

Rocks Off has not responded to a request for comment. We're told a beta version of their new website features more tasteful imagery of the General Slocum sinking into the East River.