Question 5:
The whole fourth book makes no sense. Why did (fake) Moody have to devise the entire elaborate plan of entering Harry into the tournament, and helping him every step of the way, and volunteering to carry the cup etc.? He could have skipped all of that and just turned any random thing into a portkey at any random time and he would have achieved the same result of getting Harry to the graveyard, with a lot less suspicion created along the way.
I have had this question for a while, and pashtus it’s simply a plot device. But possibly…
Perhaps Moody/Crouch would have found it too difficult to get Harry alone or get him to touch the Portkey in any other circumstance, what with Dumbledore watching over him. Smuggling a portkey where it is the least expected danger could have been easier. But thats a bit ????, so…
The most plausible explanation is that Moody/Crouch wished to continue at Hogwarts as Voldermort’s spy. If Harry disappeared under Moody’s watch, he would be quickly found out. But for Harry to mysteriously go missing in the maze (remember, the Cup would have returned by itself), the blame would not fall on Moody, especially with Krum under the Imperius Curse and ready to take the blame (admittedly, this is all conjecture, but it does appear to make sense).
And it’s worth remembering, Crouch was a certified madman.