No, I don't think that's true. The most logical explanation is that Harry's name got placed in the cup because Harry wanted to compete. It certainly seemed less likely that Harry's name was placed in the cup by someone trying to do him harm; the only reason to believe that is because you trust Harry. And let's face the fact that while Harry is basically a good kid and Snape is completely wrong about his assessment of Harry, Harry has done A LOT of things that would give someone reasons to question his trustworthiness.You know, that's an interesting moment. Normally Malfoy shows more cunning in his actions, only attacking when no teachers or only Snape is around, and the only witnesses are on his side. But there, he pulled out his wand in the middle of the Great Hall and blasted away without regard to who could see him. All because Harry semi-insulted his mother. Draco is clearly a momma's boy.
Also clearly, his mother is his greatest emotional weakness. Rowling has said Draco and Harry would work together at some point, and some people have wondered what could compell them to do so. A threat to Draco's mother might be it. Draco would be so desperate that he'd accept help from any source, and Harry... well, Harry wouldn't be able to allow anyone to suffer if he can help it.
Indeed, his refusal to allow himself to hear/see the evidence even when the consequences of not doing so were so severe suggests his desire for revenge (and for something completely unrelated too) overcame any wish for justice. He's done the same thing (ignoring all data that do not support his hypothesis) on other occasions, it's just yet another flaw to add to the list!
But a lot is made of the Cup being very dangerous, people getting killed in the earlier ones, thus the age limit in this one. As Harry was only a 4th year it is quite possible he would have been injured badly, or worse if he hadn't had so much help. Anyway, everyone there seems to be ignoring the fact that the magic needed to make the Cup think there were 4 schools was far too advanced for a 4th year...
Even if I were to conceed that last point, which I don't, it still fails to deal with the points raised by "Moody". As he said, it would take some powerful charms to convince the cup to spit out two names from the same school. Charms that a mere student would not be able to pull off. This problem alone would discount Harry or any of-age student from being the one to put his name in.
No, the Confundus Charm was used to fool the Goblet into thinking there were four schools instead of three. Here is the relevant quote from when we still thought Moody was moody: "Because they hoodwinked a very powerful magical object!" said Moody. "It would have needed an exceptionally strong Confundus Charm to bamboozle that goblet into forgetting that only three schools compete in the tournament.. . . I'm guessing they submitted Potter's name under a fourth school, to make sure he was the only one in his category.. . ." I've re-read the confession scene at the end and there is nothing there about how the goblet was fooled so this is really the only information we have on the subject. As that guess came from Crouch Jr. we can be fairly certain that this is how it was done. I doubt that the goblet would select anyone with no school name on the slip, how would it differentiate between candidates?
