Information that could make civilians more dangerous to police or military should not be available to civilians at all, obviously.
On the contrary, it's precisely the opposite: civilians must have access to such information, to keep the police and military in check. As far as the US goes, this is discussed extensively in the Federalist Papers, in particular by James Madison #46 and Alexander Hamilton in #29. Both explicitly state the assumption that the citizenry at large will outgun any Federal standing army. To quote the latter, "...if circumstances should at any time oblige the Government to form an army of any magnitude, that army can never be formidable to the liberties of the People, while there is a large body of citizens, little, if at all, inferior to them in discipline and the use of arms, who stand ready to defend their own rights, and those of their fellow-citizens." The rationale for the Constitution, and therefore for the very existence of the Federal government of the United States, is predicated on this imbalance of power in favor of the citizenry.
And mind you, Madison and Hamilton were speaking for the pro-big (relatively speaking) government faction. Their argument, stripped of the flowery language, was: "Don't worry, it's safe to let the central government field an army. If the politicians try to misuse it, the citizens will just shoot them."
Furthermore, the very idea of any power or information being available to government agents but not to the citizenry is contrary to the core philosophy of the US system. Per the Declaration of Independence, governments "derive their just powers from the consent of the governed." That is, whatever powers government has are delegated to it by the citizens. The government's powers are a subset of the powers of the citizenry, by definition, because for the government to have the power to do X, the citizens must first have the power to do X in order to be able to delegate it.