Re: Ships full of Terrists! Pirates! Podophiples!!
Improved emergency responses are part of the idea behind transmitting the cargo data, but the entire concept was fatally flawed from day 1.
Publicized cargo manifests are so (in)famously inaccurate that they are generally regarded as fiction. On any given cargo vessel from any country there is a near certainty that things and/or people are on the ship that aren't supposed to be. Nobody in the industry takes those things seriously and any concerns about accuracy fall of in direct proportion to the size of the destination port.
As far as open water assistance goes, it isn't like calling the police to a known address. 'Official' first responders on the surface can take days to reach a vessel in distress. They'll fly over and wave, and tell you how fucked you are, but timely, organized responses can't be counted on. At sea you depend on a lot of serendipity and the goodwill of anyone nearby. When responding to distress calls you assist anyone and everyone regardless of what's on their ship. By the time official people arrive everything will be known about the cargo already.
Regardless, as everyone knows the manifests are bullshit anyway, any boarding is done with a worst case scenario mentality. The entire idea of 'well informed' first responders on the open sea was dumb from the get go.