We need a name for this fallacy: "We are empowered to stop terrorism." (or drugs, CP, etc) "X can be used for terrorism." "Therefore we are empowered to stop

We need a name for this fallacy: "We are empowered to stop terrorism." (or drugs, CP, etc) "X can be used for terrorism." "Therefore we are empowered to stop X." Thus that agency gains power over all possible X. Like cash, any monetary transaction, photography, encryption, any messaging system whatsoever, or any number of other things that should make up the bedrock of a free society.