The Rick Roll MIDI is kinda pointless. I don't think that many people are dumb enough to install QuickTime just to play a MIDI
that wasn't there yesterday. Never mind it's clearly embedded into the source and not obfuscated. Even IE8 automagically blocks it with a giant-sized security prompt.
But, even so, Rick Roll isn't very imaginative. ._. It's freaking 2009. Put a little more thought into it!
For everyone else, have some decently original content in comparison:
http://www.youtube.com/watch?v=6qCSahatkbk