Speculative NSA Surveillance Map

The ACLU has released an article and map that speculate on the ways and means the National Security Agency might be spying on Americans. The map is especially interesting, showing known ports of entry for telecom data into the country, and potential points of NSA interception. I suppose it's largely rhetorical since it's almost completely speculative, but it's a powerful infographic nonetheless. Is this an abuse of cartography or a case study in its ability to simply convey important data?