It depends. Everyone has a breaking point, violence intentional or not, usually people will eventually resort to it.
One time in a year 10 math's lesson, I was sitting at the front (I hate sitting at the front, I don't like having people behind me...) doing my work, and the teacher left the classroom to get something from the staff room (big school, took him a while). I just continued with my work, and people started throwing stuff at me. Started with rubbers/pencils... ended up with bags. Eventually some ... hit me on the head with their bag (was quite heavy :/ )... I kind of snapped, turned the table over, stood up n threw a pencil case back at them and left.
Not the answer to respect though.