Your pipebomb example is contrived, black and white. The real world has better examples.
Explosives are only tools, used extensively in mining for instance. No matter how well protected, it is sometimes stolen and used to rob banks or blow up cars. Would you ban all explosives? Would you charge those whose explosives were stolen with the crimes committed?
Guns have many uses; estimates range up to 2.5 million times a year in the US when someone uses a gun to deter crime, such as home burglaries or gay bashing, and my own limited experience with friends and neighbors thinks this might be low, altho it's anybody's guess how many of these deterred crimes would have actually happened. Those hoplophobes who hate guns would sue gun manufacturers when a gun is used for evil; but they ignore the good uses.
Cars are used in crimes, so are phones, bicycles, airplanes and boats, and we may as well get silly and throw in shoes and clothing and even food. Does anyone really need a car which can go as fast as 90% of the cars sold today? Should we take the really fast cheap ones, the "muscle" cars, off the market as being too commonly used for crimes such as speeding?
Governments make noises from time to time of banning pre-paid cell phones because they are hard to track and too often (by government standards) used by criminals. Should we ban all those?
Cash is awful, for government spying ends. The classic criminal tool is not guns or fast cars; it is a briefcase full of cash. You never see bad guys paying each other with checks or credit cards. Arguably cash is the most common crime tool and enabler. Should we ban cash?