The Canonicity Gap
Taking a break from the latest batch of ongoing stories, Wil, Jadi, and Angela sat in a booth watching Benny drink Jamie under the table.
An elderly man suddenly stood before them, clutching his lapels. "Who are you, hmm?"
"We're your future companions, Doctor," Wil said.
"What season? Or are you from books?"
"We're from the Internet Adventures, newsgroup round robins."
The Doctor huffed. "Newsgroup? Fanfic?" They nodded. "Well, I won't have it! Noncanonical characters shouldn't be in here!"
"But this pub is itself noncanonical. It's on the newsgroup."
The Doctor floundered, lost for a response, then turned and left.