I think most people were intrigued because of the experimentation and just having that kind of knowledge (ability) at your fingertips. There's a very strong DIY mentality that gets spawned from information like this. I don't think the mere presence of such material should be discouraged for that very reason. Anyone who seriously wants to implement any of these projects for nefarious purpose will need an extraordinary amount of self-discipline to carry it out. Even if they succeed, it's hard to believe any will succeed without raising red flags. The societal benefits outweight the risks.