Ron the Death Eater/Comic Books

Examples of in  fan works include:


 * Parodied in The Unwritten, about a son of a writer who got famous after creating a series of novels very similar to Harry Potter. The first two start with fragments of those books, and the third with a fragment of Frankenstein. The first page of the fourth issue shows Harry's counterpart slaughtering Ron's and Hermione's counterparts in a really terrible way, only to have it turn out on the next page that it's a Dark Fic.
 * The entire League of Extraordinary Gentlemen seems to be based around this trope. Mina, who at the end of Dracula  was happily married to Jonathan Harker divorces her husband and presumably abandons her child prior to the beginning of the first volume. The upstanding Great White Hunter Alan Quatermain is an opium addict. Perhaps the most extreme example is from Black Dossier. The comic features a violent, sociopathic, date rapist version of James Bond in a Lawyer-Friendly Cameo. Jonathan Harker goes from a loving and fiercely devoted husband to dumping his wife for being "soiled goods'.
 * Tron: Ghost in the Machine (based off the Alternate Continuity of Tron 2.0) depicts Alan as somewhat callous, work-driven, and harsh towards his son. Of course, his circumstances in the 2.0 timeline suck worse than his circumstances in the Tron: Legacy one - Flynn still vanishes, but he's been relegated to a lab instead of the boardroom, and while Lora's alive in Legacy, she died in 2.0 - but the depiction really goes off the rails when he was shown murdering his wife in a jealous rage.


 * X-Men fandom sees a lot of this. Those most often targeted seem to be Jean Grey, Cyclops, and Professor X. Oddly enough, the character in X-Men with the largest Hatedom, Wolverine, doesn't get it nearly as much... likely because Wolverine's haters also tend to be the sorts that hate on fanfiction.