While that is very true, should you state your grievances on Facebook, then it makes you easier to target.

All those anti-Israel comments on FB at the moment - bingo, you've been tagged as probably anti-Semitic, potentially a Muslim terrorism supporter and worth putting on a watch list.

Now if you happen to go to a humanitarian demo that is judged to be pro-Palestine then you are highly liked to be filmed (especially in the UK). The contents of those police cameras are later downloaded and processed. Face recognition software cross-references you with Facebook and other public people databases.

Searching....ping....found target...

- Name: <Tertia>...

- Anthropology: Caucasian

- Source: Facebook NSA hook

- Threat score: 1.3

- Upgrading threat score: + 2.5

Auto triggers:

- Flag Homeland Security

- Tag passport

- Watch social security number

- Track internet usage (log level: all)

It is probably an exaggeration as of today, but this is the system that the NSA is aiming for.