It’s a standard conversational shorthand to just say “Frodo Baggins” instead of “Frodo Baggins from the Lord of the Rings”. Going “ha ha! I didn’t really mean THAT Frodo!” is a sophomoric word game, and completely unrelated to the topic of fictional evidence.
I agree with your point, but all you really do is describe the idea. http://lesswrong.com/lw/1lw/fictional_evidence_vs_fictional_insight links to two other posts on this topic already, one of which is part of the Sequences, and this post doesn’t really seem to add anything new.
I really like this solution, and appreciate you listening to the community and coming up with this :)