Most cases of Fontaculosis results in the infected getting confused with which writing is which, as they regularly forget which font was theirs.
Tom: Lol yeah I thought so. (Crazy rainbow font with Italics and underline)
Bradly: Who the hell is writing this, stop changing your font man, I can't even understand it, and its a bad font. You're not cool, give up you noob.
Tom: Oh.. I see.. (Plain black Times New Roman)
Bradly: You fail. Get checked for Fontaculosis.