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Please note that my original reference to the Constitutions was made to go to the chief social contracts, for brevity: in the case of the USA (which we have picked again to focus on some important cases), condemnation of trespassing, peeping and eavesdropping was part (I understand) of the Common Law from the beginning (inherited from Britain).

They are all cases of instances of breach of a basic principle - license of intrusion is limited, naturally -, which in law needs to be made explicit to sanction specific cases, but remains otherwise evident (in the case of privacy, its breaches are easily farcical).

In Europe, the European Convention on Human Rights (1950), signed by 46 States, specifies in Article 8: «Everyone has the right to respect for his private and family life, his home and his correspondence» (again, an example picked for prominence).

Please also note with reference to your «All bets are off now» that discussion will be made about the boundaries of the principle in practice - the Principle remains.