Interesting thinking VIXTE. I hope you're going to tell us more of your ideas 
You still think Madeleine was abducted?
Well, five or something years ago there was an excellent blog from a portuguese guy, it was an excellent review of all possibilities and very realistic and non biased from any side. He also translated it to English.. I cannot find it now, I think it was taken down but I am kind of thinking the same way as him.
My opinion is that it was impossible for the McCanns to cover the crime in PDL at that time they were there.. for that they would need to have a help from their friends and some of their 'friends' they even did not know that well.. for example Matt Oldfield, he did not know the McCanns that well.. and to cover up a crime they would need help from these people. I don't think this is realistically possible for anyone of that group to cover up for the McCanns.
What I am not sure and this hasn't been discussed much is how much would you trust people who are actually not your close friends. Is it possible that The McCanns are a little bit naive about 'the friends' and that someone among them is a 'hidden criminal'? It might have been that Jane Tanner has said it on purpose about the man carryin g the girl, it might have been that Matt Oldfield has been accomplice in the crime with 'some group' .. I am not saying again that this has happened but if I was investigating this case I would not look at this group as 'the one' like many anties do.. so that is one thing.
Another thing is the possibility that she, Madeleine walked out on her own.. for that she would need to be able to open the doors, even maybe windows.. Was Madeleine able to do it? We don't know Madeleine, we cannot assume anything here.. maybe she was able to open the doors, maybe the doors were heavy and even me and you would have difficulties to open them.. so we don't know.
And even if Madeleine walked out on her own.. what then happened to her? How come she was never found and nobody brought her back.. and nobody called to say they saw her..
What is confusing me are the road works being done that time, the road near by was open, with a surrounded hole.. was this checked properly? But looking at the searches the PJ has done, I do believe these searches are done properly and open road holes were fully checked.
Then again, there is a possibility that Madeleine was hit by a car or attacked by a dog and the owner has covered it up.. again no clues found.. was the cover up so good?
The further theory is that she was indeed taken.
And why was she taken? Was it that she saw someone she knows stealing in her apartment? Someone who worked with her in OC or elsewhere?
Or was it a planned abduction?
As a technical person I tend to think if someone has given me the phone records, thousand of them, I would maybe be able to solve it myself.. it is not hard at all to work with such data if you know what you are doing..
I analised large documents in past and although I worked to find the hackers and similar attacking the system the principle is actually the same.. pinging the masts, the towers, if there were at least two mobile phone towers it would be easier, especially if one is catching the OC area and another the place where the Smith sighting is.. then you can compare the two records.. and voala. find the number that matches both.. and this is if the person was carrying a mobile phone.. but I think this is their biggest bet, together with bank transactions in the area, since they done have CCTVs
Also there are modern policing methods that we don't know about.. their progammes they use to check the data, the data collecting, the phone tapping, the collection of internet searches.. many things that we maybe never heard of or know that are being used..
Playing Agatha Christie or some second hand psychological profiling of the parents, friends etc or old fashioned policing theories like Amaral used wouldn't work in this case, my opinion is that only the modern technology can solve this case.
