I enjoyed all the references I could track- Lethal Weapon, Prisoner, B5, Shadow and Bugs Bunny as well, but it seemed Harry's youthful enthusiasm to use his new theatrics prevented an opportunity for the Slytherins to grow into their mature intervention. Maybe he doesn't care if they grow so long as their scared, but it seemed a wasted opportunity. Still a decent offering.
The messageboard trivia was funny-ish but for a lean plot-driven story like this it feels a little spurious. Why spend time on it when the joke was done well enough with the BSOD last chapter?
I hope these comments help. The story is good fun and brutal justice, like a good summer popcorn movie.
wordhammer