Paper shredders cost like $20. You don't need a CIA-model one that shreds it vertially, then horizontally, then diagonally, then irradiates the confetti, then burns it, then crushes it...just get a nice one at Target.
Paper shredders are great, I use my primarily to deal with all of those shitty credit card apps that come thru the mail. Just make sure to buy one that can handle more than just a 2-3 sheets at a time.