It doesn't appear to be a crime, sadly. Scott Joseph, restaurant critic for the Orlando Sentinel, compares the Absinthe Bistro in Orlando to L'Absinthe Cafe in Paris:
He brought to the table a glass, a carafe containing the liquor, a special silver-plated spoon, a sugar cube and a device called an absinthe fountain. He rested the spoon, which is flat and slotted and resembles a cake cutter, over the lip of the glass and put the sugar cube on the spoon. Then he poured the absinthe from the carafe over the sugar cube and into the glass. Then he set the sugar cube on fire, the blue flames licking into the glass.Interesting to see how the "ritual" has been bastardized by Czechsinth.
The fire part of the ceremony, it should be noted, is more theatrics than necessary. In fact, aficionados say setting the sugar cube on fire ruins the flavor. But I was in no position to argue with the man.