My CS course allows to use of others code, given proper attribution, but you only get marked on the stuff that you yourself contributed - if you were to take ot

My CS course allows to use of others code, given proper attribution, but you only get marked on the stuff that you yourself contributed - if you were to take other people's code all the time you'll get pretty bad marks. I think that works as enough of a deterrent to what you suggest whilst allowing students to get on with making interesting projects and not reinvent the wheel.