Just something that came up on another board recently:
It's much, much better than that. Over on the Warships Project Board, the idea of an eight-Dora battleship came up and somebody worked out a rough "design" to show what would be involved in such a ship. The resulting design came out as a 700,000 tonner that the poster jokingly called the H-45. Then, a wunderwaffe author called David Porter came along, saw it and decided it was just what he needed to complete his latest book about Nazi superweapons and included it as a genuine project. Then, somebody took the information from that book and used it for a Wikipedia article. Despite people telling said person that the data was false and showing where it came from, the idiot kept re-inserting it on the grounds that nobody could prove it didn't exist.
Wee for the Wunderwaffe!