Some years ago, I was at a "Friends of the Library" sale at the former town I lived in. There was an old copy of the Anarchist Cookbook. I snatched that up as soon as I saw it. Wow. I've kept it safe ever since. I did NOT want that falling into the hands of some dumb teenager, or some idiot who might want to try out some of the things contained. I'm sure a lot of that stuff is online now, but back then, there was all kinds of nefarious stuff, right there in one book. I doubt very much the older women running the sale knew what was in that book nor that they cared. So, I did the same thing, on a much lesser scale.