There are books in the public libraries that will educate you on building bombs. I don't see how knowing how to do something is a problem in any sense. Knowledge is power. Bomb building is just a piece of knowledge that I doubt that I'll ever be using. It's seriously a dangerous business for the bomb builders. The weathermen proved that in the '60s.
Then there were the two unsupervised boys in my neighborhood when I was a kid. They hacksawed a leg off of a kitchen table and filled it with black powder from unrolled fire-crackers and match heads cut from book matches. They put a long fuse through a metal cap, placed the metal cap onto the top of the sawed off metal table leg, and struck it with a metal hammer. After shrapnel removal in the ER they sent them home. They just never could find the thumb and the next two fingers of the boy that was holding the cap in place. That half of his hand is missing too. He likes to keep that two fingered skinny hand in his pocket. I understand why.
I won't be building any bombs, mmmm, probably ever.