Hard to say for sure. It could be a blend of truth and imagination. Maybe some aspects are true, while others are made up to make the story more engaging.
Well, Mr Bates vs The Post Office is typically not based on real events. It might draw inspiration from various sources but is mainly a product of imagination and creative writing.
Well, 'chopper fanfic' is basically fan - made stories that revolve around the concept of 'chopper'. If 'chopper' is a vehicle, like a motorcycle (which is often called a chopper), then the fanfic could be about cool rides, customizations, or races involving these choppers. It all depends on what the 'chopper' in question represents in the context of the fanfic.