This is what I do. I stated doing this because every time I was going to get a stamp, the agent would flip through to the first blank page and stamp. I am on my second set of extra pages and really don't want to get a new passport for visas. So since last year, I hape paper clipped about ten blank pages together. The TSA - and CBP - have not said a word to me about it. If a TSA clerk would try to take off the paper clip, I would certainly say something and try to grab my passport back.