You could do it, but I'd say you will regret it later....
Seriously if you want your scrapbook to stay together, page protectors are the best way to ensure that. I mean, if very many people are going to be looking at the book, then you may want to rethink it and get an album with page protectors....
If it is just to keep the stuff together and will be stored, then it will prolly not matter too much.
hth! <img src="/images/graemlins/smile.gif" alt="" />