other purposes of communities

on 28th of september, we talked about why people start communities.

We saw there's a strong need to set a purpose.

Most purposes are positive and all a bit similar to each other.

The goal is mostly to bring people together and exchanging opinions about stuff.

That's all pretty great but what if the wrong people come together and they have very strong opinions about some things? Communities helps them to recruit other people to go with them.

I don't get that out of the blue, but i read an article.  

'FBI finds terrorists AL QAIDA on facebook.'

It's a dutch article so i will just put the link to it:

http://www.hln.be/hln/nl/960/Buitenland/article/detail/773144/2009/03/17/FBI-vindt-gezochte-terroristen-al-Qaida-op-Facebook.dhtml

Terrorists uses Facebook as a way of propaganda.

Luckily also the FBI uses Facebook and it helps them with the investigation in the way where people are or how they got recruited. They already found some of the missed man due to facebook.

Personally, i don't think that Facebook has a great impact on finding or recruiting criminals or terrorist, because al qaida isn't so stupid. But likely, it's a way to find people, positively and negatively.