I think the kidnap threat is a sexed up version of the supposed death threats on the Madeleine Facebook group. The McCanns were unbelievably successful with that particular scam and got the front pages of several tabloids. Internet trolls are a hot topic at the moment and a great way to get sympathy. By tweaking a few details they have made the latest version more sensational by changing the target from Kate to the twins. Again, they are shamelessly using those children to manipulate public sympathy. In my opinion that is wrong on every level and it needs saying!
The story can no doubt be quickly disproved, but they have the headlines they wanted - 'Kidnap Threat to Twins'. By the time it is revealed as a hoax, the damage will already have been done. All the public will remember is the kidnap threat. Similarly while most people recall that Goncalo's Amaral's book was banned. The fact that the ban was overturned and it is back on sale passes them by.
The McCanns still appear to be pulling the strings, they have learned a lot media tricks over the years. Goncalo was obviously way ahead of us in asking for the trial to be heard in private. He probably foresaw what was going to happen. The McCanns will fight back with what they do best. Negative propaganda. They are clearly prepared to get down in the mud and the blood and the beer with this latest outrageous story. Lets hope the Judge can see the histrionics for what they are. As for Dr. Amaral. he really doesn't have to do very much at all, he has an Ace up his sleeve - The Truth.