You know, I don't actually remember the voive coming over the speakers to say no flash pictures either time that I took photos on HM, but that doens't necessarily mean it didn't happen - just that I was so far past paying attention and being a little devil photographer. I will say one thing though, as far as flash photography on dark rides, it bothers me least of all on HM because you're pretty much sheltered in your buggies and it doesn't flash in someone else's face the same way it does on say ... POTC. But it's still very aggrivating if you're not the one taking the picture. But for scenes like that one, it's really the best way to get a picture you'll love. For the ones in the hallway, I'm not too big of a fan because the way the flash hits the blue walls just makes it look weird to me.
It's just something I didn't really think about when I went a few years ago
(I was even worse about it in 2006 when seeing the new Jack Sparrow additions on POTC). Now I know better and must find new ways to get something good away from the rides. I think I will try bringing the little camcorder thing and see how we fare with that if I cover the LCD screen.