"Sounds" interesting, but I'm not sure what is real purpose of this...
I'm not neather not sure about this, but I think the idea is to get an illustration over the friends your are commenting and writing most to and they are commenting you. Somekind of a social analyse of your friendship or someting.
The interesting part of this in a security issue is that If you can do this other probably also can like company's (in best case) and government (in worst case) that want to have track of their peoples communication and so. So I think this information can be a warning of how other can use your communication links to have track of you and your friend's thinking and opinion's about thing.
So this is for me a warning of what other can get about you selfe and use against you in some case's.