"Berlin: Police can secretly enter homes for state trojan installation"
Not clear if this means without a warrant.
Secretly accessing premises to fit bugs has been happening for decades in the US (and other countries?). Watch documentaries about the FBI vs the mafia. But, crucially, there are/were very strict rules and a high threshold.
I don't know what the answer is anymore as it seems all our democratic processes defending us from these erosions of our liberties have simply ceased to function.
We're all getting the shaft one way or the other