I haven't checked the details of these accounts yet, but what I can see right now is that they all post on the same local board.
It looks like the Philippine local section is made up of two or three people
who own a whole farm. If you have time, please sort out this tangle. For example, a first look at the kingvirtus09 account shows his alt benalexis12.This is a bit racist. I saw many users from different board like Turkey, Indonesia and Nigeria that jerking merit to each other blatantly while they join together on campaign just because campaign manager choose participants based on merit count except when the account reputation is already reputable.
Why not focus all your detective instincts on user like this https://bitcointalk.org/index.php?topic=5491383.0 that obviously farming hard signature campaign.