How to build bombs with common unsuspicious parts is already widely publicly available information. The truth is that the dedication to learning builds character. Most people are far less evil than you think or too stupid and lazy to do 1 internet search. Either way, same effect of safety.

Take martial arts for example. The knowledge is there for anyone to find out which ones work and just go practice. The world around us shows that the people picking bar fights couldn't be bothered. The people who could be bothered don't go around picking fights.