People that sit in the front tend to want to hear what is going on and take notes. So you and your friends sitting in the second row does not make sense. Taking the whole class time to try to connect your laptop to the internet, then when it doesn’t work going through all the pictures you have as your background and showing your friends was annoying to everyone behind you.
Your classmate that was trying to learn something.
P.S. It is probably not a good idea to put porn pictures as your background.