Hahaha, exactly my thoughts. He will have weaseled his way out in no time - he'll both convince you that friendly AI is imperative, and that he can probably deliver on it. He'll also prove once again that you can neither put an AI nor him inside a box and expect either to stay in there.
Thinking outside of the box is just way too much fun.
I've just noticed when searching for "rationality" with Google, HP:MoR is the second hit. Wikipedia is top, which is both good and expected - but I was suprised to see HP:MoR so high up.
I think it's a good thing, anyone looking for info about rationality seems likly to be suprised by Harry Potter being mentioend, and then have a look at it.
The first mention of Less Wrong is on the second page of results, but I wouldn't expect "Less Wrong" to be as attention grabbing as "Harry Potter" when you've just searched for "rationality"