I am pretty much convinced of the validity of remote viewing data in most cases. However, for reasons that I won't go into I also have strong reasons to believe that certain aspects of the timeline put forward by Farsight are incorrect.

In the scientific method, it is foundational to the study of any phenomenon to explore the null case, the case where the effect in question is not happening. If I want to understand electricity I should measure what I read on my instruments when nothing is plugged in, for example, this is sometimes called a control experiment.

I believe that it would be extremely interesting and productive to have such high quality remote viewers as those at Farsight remote view something that categorically does not exist (except in minds), in order to help form a picture of what is picked up by talented remote viewers in that case.

You could say that remote viewing all of the provable events acts as a control, but when we get really out there with the angels and the demons, heaven and hell and so on, I don't believe that there has been sufficient collection of control data in that realm, where it is possible that viewers are picking up strong emotional and psychic facets of the collective (un)consciousness, rather than a "real" target. It would be fascinating to me (and I'm sure others) to see what they pick up, and it would have profound implications whether they pick up, in the case of the tooth fairy, a playful creature, a lie, parents etc. and would shed light on how to properly interpret remote viewing findings in the most scientific possible way.

TLDR: Do remote viewers pick up things that only exist in people's imagination?

I have also thought about this and agree with you! Courtney has said that the target should be verifiable, but a lot of the projects at Farsight are not verifiable, such as future events, etc., (but fun nonetheless).

Vote yes to this. If not by Farsight, at least a team of RVers somewhere

if imagination is the gateway to access different parallel realities or timelines, then what you are feeling and visualizing while imagining that reality it's just a different version of yourself or another reality from the infinite possibilities.
The question is.. will i create a target more in alignment by our collective timeline possibilities, pass present future, or will i perceive or create one completely set apart from our collective frequency that we humans operate in.
We can perceive other et civilizations living on earth but their frequency is a bit far out from ours, so in other words we can say they do not share the same fractal of the quantum field timeline as earth humans collectively, so in order to a session be more verifiable we create targets that are more in the spectrum of the human timeline on earth and beyond on the 3 temporal spaces, pass, present future.
So it goes to say, et's do exist, Fairys also do exist (in fact there have been footage from infrared RING systems where people have been recording what appears to be fairys, believe it or not), bigfoot does exist, Santa also existed (although it had another name before and goes far beyond paganism), so could it be also that we were made to believe, as a mechanism of deception from oppressive societies, that all of this is just fairy tales?!
Remindes me also of Daz, if i remember correctly he created a target that supposedly doesn't exist, all his imagination, later what remain was the question, "Did this visual target was made up by me or was me accessing something that i saw in the pass, years ago, and don't even remembered but somehow through my imagination i accessed that memory (because everything is recorded deep inside of us)?!

Here's an idea:

Remote view Neo – the fictional protagonist in the Matrix movies – in a selected scene, including a deep mind probe.

Then remote view the actor Keanu Reeves while he was playing that character in that scene.

Will there be any differences?

This is a brilliant idea, I think about this frequently, especially with targets such as the most recent (kids allegedly kidnapped by a UFO in the jungle). Many books on the RV subject touch on this phenomenon, even Courtnry mentions it in his own books.. So, yes, if the viewers are probing for an event which didn't really happen, I believe there is a great possibility they will pick up next best thing, which is the collective consciousness' "idea" of the event, and especially if event is fresh within the subconscious minds of millions of people from watching the Shawn Ryan show.. and it is nearly impossible to differentiate fiction from nonfiction at that point.. However, I wonder if the tasker can use certain words or cues when creating the target, as to eliminate this phenomenon from happening, or at the very least provide a much lower probability of this occurring .. Perhaps during or after the session a cue can be inserted which says something like "if the viewer perceived an event which was based within our current physical reality and timeline, and could have been witnessed/recognized using at least 2 or more of our physical senses (sight, sound, smell,..), the viewer will perceive a blue square, and conversely "if the viewers perception cannot be confirmed to be based in physical reality, or if the info is coming from non-physical reality and cannot be physically sensed with at least 2+ of our 5 senses, they will perceive a red circle" -it's just a quick example, but I'm sure you understand the point.. It may give us a bit more confirmation, i'm sure there must be some kind of phrase the Tasker can use to help with this, I'd be great to have some kind of control target..

I also agree this is an important step that seems to have been missed in this field. Especially if we want the practice and knowledge of remote viewing to spread and start getting accepted by the general public as legitimate it is essential to understand the extent and limits of the phenomenon. I highly urge the Farsight team or any other experienced remote viewers to try this and report the findings.