I agree with Sissi. I think it is someone who has a beef with the Ramsey's and also has a connection in some way to child *advertiser censored* or has a sexual disorder of some sort. I think they intended to actually kidnap the child and wrote the ransom note BEFORE and things went in a different direction.
I think if the Ramsey's had done this, whether it was a cover up for Burke or Patsy killing her, they would NOT have written the note about kidnapping and then leave the child's body in the house. Also, after listening to the 911 call, Patsy does sounds honestly hysterical and distraught. She is not an actress by any means, and I don't think even Meryl Streep could have sounded so incredibly frightened as she sounded, so how could anyone be that distraught and have just previously written a ransom note, and practiced it a few times. The handwriting would have reflected someone in a panic. It was by far too thought out and written in a calmer manner. It is obvious by looking at it. A parent could NOT write that lengthy and thought out of a cover up ransom note if they had just murdered their daughter and then staged it to make it look like a sexual sadistic crime had occurred. Makes absolutely NO sense. And despite what some believe on here, Patsy DID NOT write that note. Crap, my handwriting could have been linked to it. I have some of the same characteristics as the author of that note and I KNOW I didn't write it.
They would have taken the child's body out of the house THEN called and reported the note, etc. Why, even Mark H. had enough sense to remove the body before he came up with his phony story. You would have to be nuts to make up a kidnapping story and then not even move the body from the premises, knowing someone could possibly find it within a couple of hours (which didn't happen either, it was several hours). They had plenty of time to take her out of the house, dump her body in any place around Boulder and get home in time to make up this story and hope they didn't find her little body. I just don't buy it. They may be a lot of things but they are not THAT stupid. I realize to some there is so-called "evidence" pointing towards their guilt but it is evidence that could definitely be explained away by the child being murdered in the house where they all lived (fibers, etc.).
The person that did this was not new to this criminal activity. Murder may have been the ONLY thing new to them but they had sexually molested someone else before. This time, they did it to someone they, in some strange way, cared about but was sick of the Ramsey's for some reason and took this avenue to get to them in some way. Had the perp actually achieved getting JonBenet out of the house and kidnapped her, I don't think she would have made it home again alive and I think that was their intention because they knew she would be able to identify this person. This wasn't about the money, it was about some sicko wanting to make the Ramsey's pay in a different way for something that upset this person. Sounds to me like the perp had a big problem with Patsy and her lavish lifestyle and her putting her little angel out there for all to see, showing her off like a trophy or something. IMO.