I find it difficult to see this as a serious question. With a simple search you can find out lots of information about governments abusing power and control, blocking internet connection to its people so the world does not know what's happening.
There are so many recorded cases of governments doing something wrong to someone innocent, but I'll direct you to one related to my country, look up the case of Ken Saro Wiwa.

The bottom line is we do not live a utopian society, and everyone is liable to err, with this, no one should be giving full power or control as it can be abused.