I am not sure about meetings since I do not have much experience with them. But if you do not want people to use laptops during lectures 1. Record your lectures and make them available later (course website, internal network anywhere). 2. Create PDF of your own notes and distribute them BEFORE lecture. 3. Ideally, though this is a huge amount of work, so not always possible, write down in detail the steps in your lecture like a book chapter and distibute this BEFORE lecture. Alternatively, assign a book chapter pre-reading.

In short, if you want people to pay attention to the content during the lecture, remove the incentive to take notes during the lecture.