I've followed a pattern (Receive Signature earning and move to some exchange or other address) and I have got some more accounts connected here
Very good research, I know how much time it needs to compile stuff like this.
When you have address connection together with merit connections than something stinks here.
If posts are with similar writing style than case becomes evident, but I don't think we should start giving them all negative feedbacks.
We all know people are using multi accounting here (and everywhere) and this is not forbidden in forum, but it seriously reduces quality of conversations.
This appears to be an attack on a specific region, which is not acceptable.
And you are saying this because you are coming from that same region, right?
It doesn't look at all like attack on whole Nigeria to me, and if there are some connections between some account that should be investigated more, especially if they have similar low quality posts.