No. The 'Attack on Titan' series has a set of official storylines, characters, and themes which are mainly centered around the fight against Titans, the mystery of the world, and the complex relationships among the characters. 'Attack on titan fart fanfic' is likely a fan - created and very non - traditional take that has no official standing in the series.
No, it's not possible in the literal sense. Attack on Titan is a fictional story, not a sentient being with the ability to read or watch fan - created content. Fanfics exist in our world for fans to explore different ideas about the Attack on Titan universe.
Well, it's a really strange concept as Attack on Titan is a fictional entity and can't actually 'watch' a fanfic. But if we were to be creative, maybe it would be like the characters in the series are observing an alternate version of their own story. They might be shocked, amused or even inspired by the different plotlines and characterizations in the fanfic.
One good example could be a fanfiction where the Female Titan has an unexpected alliance with the main characters. In this story, she might reveal a hidden side of her nature that was not explored in the original series, like having a moral code that goes against her initial actions as an enemy. This can add a whole new layer of complexity to the character.