I do think the Tapas Seven may have covered up they did not always check on their children as frequently as they claimed (though the idea of leaving any two-year-old twins alone beggars belief), but I'm not sure the conspiracy theory extends to the dimensions you suggest Mike.
Fact is often stranger than fiction. What I don't yet understand, is how any member of the so called tapas 9 group could still have been sat at their dining tables from 9.30pm, onward (with the exception of Diane Webster who returned from wherever at 9.45pm), when a member of staff (waiter) has gone on record as saying that at 9.30pm, none of the McCann contingency were sat at their respective dining tables, and another waiter has gone on record as saying that at 9.45pm, there was only a middle aged woman sat on her own at the tables which were booked to the McCann group of 9 adults..
So, where did everyone disappear to at 9.30pm (including Diane Webster)?
Where was Gerald McCann, Kate McCann, Mathew Oldfield, Rachel Oldfield, Russell O'Brien, Jane Tanner, David Payne and anybody else, because its a nailed on certainty that none of them were at the tapas bar restuarant by or at 9.30pm? And if Diane Webster was the only person at the dining tables allocated to the group of friends from 9.45pm, and thereafter, how could Kate McCann have left that restuarant anytime after 9.45 pm, to go and do her check of apartment 5A enabling her to supposedly discover that Madeleine was not there and then rush back to the tapas bar to alert to everyone who was not even there, that Madeleine had been taken..
Their friends (with the exception of Diane Webster) were never present at the tapas bar, to enable Kate McCann to return there and inform everyone that Madeleine was gone, and that 'they' had taken her?
Who are 'they'?
How come other people who were present in the tapas bar by 9.15pm, were talking excitedly about a child who had gone missing from a guests apartment? How come Mathew Oldfield knew about 'the same thing' from as early as 9pm?
If people who have told blatant lies about this or that have to be treated as though some sort of a conspiracy must have occurred, or be happening, then so be it. Liars, and Conspirators, or whatever, a little child is gone forever, and somebody is accountable...