What is VERY key about this article is - like every other policing "innovation" tried out on the worst-of-the-worst™ in "extremely limited" situations, it will inevitably become the routine go-to tool in law enforcement's quiver.
You can't invest millions without trying to amortize its costs. You can't justify these vast sums for "only" less than a score of worst-of-the-worst™ bad guys. You can't get additional funds - or even keep an existing program running at current levels - without new worst-of-the-worst™ bad guys to target. Or even, meh-of-the-meh college protesters, former Occupiers or folks unsure whether gentrification should be allowed to be an unrestrained hurricane stripping San Francisco's soul bare with nary a complaint or picket.
Remember a decade past when we'd see armored police using military tactics and armored personnel carriers to perform the simplest tasks and think, "What a horrible country; lucky it's not here."? Now everyone -or someone's grandmother next door - potentially abusing a Medical Marijuana permit faces these full-throttle, military-grade tactics. Same with Asset Forfeiture laws. Coming soon, same with aerial drones. Etc.
Today it's a bunch of crack-dealing, meth-slinging murderers. The very same Hemisphere technology will DEFINITELY be used for the next protest, the next net-based defense of the next Edward Snowden or the next peaceful demonstration suggesting perhaps - just perhaps - the needs and concerns of us 99% might also be considered when setting policies and enacting laws.
Nip it now, before it's you in its crosshairs.