> However, I'd also guess that at least some people use the computer to look up additional information instead of stopping the class and asking, which helps everyone involved.
No it doesn't. Practically the only point of lectures is so students can ask questions. Otherwise just read the material and don't go. Moreover there are probably others in the class too shy to ask the same question, but at worst it reinforces everyone else's learning.
I hated when people asked not needed questions in lecture for over hundred people. At least attempt to answer it yourself, don't slow other 99 people down.
No it doesn't. Practically the only point of lectures is so students can ask questions. Otherwise just read the material and don't go. Moreover there are probably others in the class too shy to ask the same question, but at worst it reinforces everyone else's learning.