VideoGame.Deadpool has a similar issue. It's gradually being cleaned up, by I'm stymied by the fact I'm only starting the game and quite sidetracked by Yakuza 5.
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I'm pretty sure that Deadpool's first-person page predates the Self-Demonstrating namespace (or at least the use of it for works rather than tropes), and the reason it's used now is because people were imitating it and rewriting other random pages into the first person. I recall a TRS discussion asking why on earth Lex Luthor was written in that style when he didn't even have a distinctive voice.
The reason it's like that is because even Deadpool's official profiles tend to be written in first-person or include Deadpool arguing with the writer.
edited 1st Feb '16 11:19:28 AM by Prime32
Deadpool is a trainwreck. The comic book namespace redirects into self-demonstrating, and all of the associated subpages are written in the first person.
Deadpool has a special relationship with the fourth wall, I get it, but self-demonstrating anything should be contained to the SD namespace and not allowed to spill over into the rest of the wiki. I can't imagine Deadpool merits special treatment in that regard.
I brought this up in ATT back in December and was kind of gung-ho about it at the time, but while I have no problem going through pages and changing pronouns and tenses, a proper works page will need a write-up and I know nothing about the character. Help?