I am a big fan of HP and have read the series twice. My dd8 has always been so highly sensitive to scary things that she would not even consider reading the books or watching the movies. A couple of years ago dd walked into the room when DH and I were watching the first movie. The scene in which the students were learning to fly their brooms scared her and she ran out of the room. Imagine what would happen if she saw a scene with Voldemort? My dd5 could probably watch the movie without any issues.
I try to be sensitive to my dd's sensitivities. I had a few images from past movies torture me long after the movies' final frames. I don't want dd to watch anything that will haunt her.
