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usually you can trust the police and governments everywhere on the planet today to always do the right thingYou jest, but a weaker form of "you can usually trust the police and governments today to do the right thing" is very much true for regular citizens in civilized countries.
The two problem cases are 1) people working to keep those governments in check, which is a necessary function for their operation but one that, by definition, said governments don't like, and 2) the private sector. The private sector can, and will, abuse everything it can get its hands on, to the extent permitted by the most strict reading of the letter of the law.