I sort of agree with Burke here. And I've though about making a random thing up and selling it confidently to a few noobs, to see how they progress. But I would need at least 5 members or so to go along with it.

I think for LDing we should let people have their placebos.

I do have a problem with giving false information, or not giving the truth because it may hurt the person, because the truth usually is always better.
But in this case I think it would be okay tbh.

Would anyone be interested in participating in that research study with me?
We could tell them it's a placebo after a couple of weeks or something.

Also, most people's control techniques are entirely placebo. Even experienced LDers.
Like if they can't change the scene, people will tell them to open a door and expect it to be there.
The action of opening a door has no relevance or effect whatsoever to anything, it just plays in to people's beliefs that you must do some action to get a result. Which is entirely false in the dream world.

Marie Antoinette say "Let the people eat (or imagine) their placebos!"