PMM, If I am not mistaken, at the link provided by you, it is mentioned that - use paper clip to attach check list (on the top of bunch of rest papers), it is not suggested for whole bunch. They have never mentioned not to staple. I wonder how can you use a paper clip to 'bind' properly a bunch of 50 pages?
Or you can just use paperclips when needed for a few papers, and rubber bands by section or for the whole thing.