[spectrum]

This is the most important sentence I think:

According to the document the Dutch “are looking at marrying the forum data with other social network info, and trying to figure out good ways to mine the data that they have.”

The posts for one individual on one forum are maybe not that interesting. But by connecting this data to the data of his/her other internet activities, you get the total information awareness idea. E.g. Facebook, Gmail, other forums accounts, Whatsapp messages, websites visited etc.

[Cthulhu_]

It definitely is a dragnet kinda approach; let's just collect all the data, chuck it into a big database and see if we find any connections with insert random justification here.

[disgruntledphd2]

Also known as the "Big Data" approach. Hopefully, they at least understand that there should be differential costs to false positives and negatives.

[arsemouflon]

Sounds like something Fravia did between breakfast and brushing teeth. :-) Considering the age of the referenced documents this mechanism should be in place by now.