> The police need a warrant, I [an individual] do not

Well, you just can't legally break into and search my locked property at all; it's true that the remedy for a police violation (the exclusionary rule) doesn't apply to a private violator of property rights in this way, but that's because regular civil and particularly criminal process is available, without governmental immunities and, at least in theory, without the conflict of interest that arises when government law enforcement agents pursuing law enforcement evidence are the ones violating property rights.