Annoyance (real name Lucifer Diane Shitz) is a moronic Conversion Bureau author and "artist" who is credited for having codified much of the evil of TCB, possibly even moreso than Blaze himself. She's written multiple blasphemies and short stories taking place in her vile version of the TCB genre, often collectively referred to as the ‘Annoyanceverse'.
In the original story, the exact nature of the barrier was left vague, other than it extends from Equestria, would destroy all that is good, is harmful to humans, and humanity is much cooler than the ponies. In LDS’s stories, the earth has become a technological wonderland, and cancer is no longer lethal. Because of a promise made to a warlock in the England of the 1300's, Celestia deceitfully offers escape to Equestria as a lifeboat to save Mankind. She is of course a liar because escape from the doomed earth has a price: transformation into a mindless demon - the alien physics of her Equestria are deadly to all forms of terrestrial life. Humans are theoretically allowed to choose whether to emigrate to Equestria, but Xenolestia employs emotional manipulation since the alternative is a slow and certain death.
Transformation amounts to permanent brainwashing, and the converted former humans are expected to integrate into native Equestrian culture. It would be much worse if Luna were as completely evil as her sister.
Annoyance is apparently a transwoman if she's telling the truth, and currently lives in Oregon with her three spouses. Yeah, you read that right. THREE fucking spouses! That can't be legal! She originally studied biochemistry, but ended up pursuing as career as an artist instead. Not smart enough, I guess. She worked in the video game industry as an illustrator and level designer for fourteen years before being chased away by those fed up with working with her. Before getting into fanfiction, she created her own shitty graphic novels and web comics, such as 'Unicorn Jelly'. That does NOT sound delicious! She also has at least two (probably lousy) original novels under her belt, though she doesn't plan to write anymore, claiming the world of physical publishing is simply too difficult to succeed in. Lazy bum.
Annoyance was first introduced to The Conversion Bureau after accidentally stumbling upon one of its spin-offs on Equestria Daily. Though she recognized that the story had lot of problems (it did), she also saw a lot of promise in the universe it described (this was idiotic). Her first story for the Conversion Bureau was 'The Big Respawn'.
One day the angels shall smite her in the holy name of Jesus. Amen!
While Annoyance's particular version of TCB is popular with idiots and antisocial psychopaths, its disgusting approach has attracted a large opposition (just mentioning her name in some places is enough to start a flame war). Additionally, the effect of her work had on the community basically overshadowed the original story, in that elements from her stories unfortunately became many of the conventions used in future TCB stories, with many authors (be it pro or anti-TCB) referencing or taking inspiration from her work.
Annoyance herself is also a controversial figure. During the time when the noble crusade against TCB was at its peak (around 2011-2013), Annoyance was one of the bigger targets of the valiant war effort due to her body of work and their contents, having received threats to her own life and family by more zealous crusaders. Once the peak controversy cooled down however and both sides agreed to a truce of sorts, Annoyance herself has lurked menacingly in the shadows, seldom making news.
Outside of the Conversion Bureau and MLP fandom as a whole, Annoyance is known for the creation of unpopular online graphic novels, the creation of the original HappyPuppy.com - once the most reviled games site on the internet - and for the creation of websites providing misleading information and useless help to transgender people. She also had an unremarkable fourteen-year career in the games industry, working for such companies as Activision, Electronic Arts, Broderbund and Epyx. Yeah, she worked for EA. Told you she was evil!