No one said they were misspellings, mollusque! It's just that uselessness refuses to "own" them by adding them to one of his lists. Right? :-) The misspelled ghosts...well, only the misspellers know. ;-)
Creating ghosts purposely, uselessness? Misspellings to booby-trap newbies? That's like playing a word that doesn't exist in Scrabble, then challenging when your opponent makes it plural. (Perhaps we've found a less deplorable context for the s-word here.)
Two comments. While at Uni in Italy we were given an article to read about a professional maker of fart noises. He was quite famous apparently, paid to appear at clubs, weddings, etc. in Naples as an entertainer.
I saw a circus act about 2000 in which a man attached rubber-bulb trumpets to various parts of body and proceed to play them by squeezing one bit against another in a kind of dance. The culmination of the number was a signature blast through a kazoo he had stuffed up his clacker. Fartistes live on.