There's a great, and true, story of a guy who wanted to synthesize some drug I can't recall now but it was something like cocaine I think. He found the process described in detail in a textbook in a University library, removed the pages and went home to set up his own lab. What he didn't understand was that it was very easy to accidentally also make a compound that results in Parkinson's. Since he wasn't trained chemist and besides had no way of checking how pure the result was he ended up making a product that was heavily tainted with the bad compound. He developed a severe case of the illness and ended up taking his own life by ingesting an overdose of the drug he made, while propped up against a tree on the University grounds if I recall correctly. There's a lesson here. This was figured out after the fact by some guy who got curious about the incident and backtracked the fellow's steps, including locating the exact same reference book with the pages removed. It was all in a fascinating documentary I saw years ago. If I can find more details I'll come back and post them. And correct any errors I probably made.