This is a big mistake. Stuff that hasn't been used, touched, or thought about for years will -- at some time, be missed...and when it is, the one who threw it out will suffer. In my experience, it's better to bear the burden of a trash-strewn habitat than to try and replace some obscure book, toy, or item of clothing. It took me years to replace a plush caterpillar of my daughter's and when I found a good replica, she was in university. I still wish I hadn't thrown out the original!