I guess some people just get their jollies out of being a thorn in others' sides. Or buzzkills. Or just plain trolls.

The thing about this group is that they keep creating new accounts and then use that 15SP delegation from Steemit, Inc. to downvote eternally... but if you use one of the blockchain viewers for a closer look, you'll discover that they ALL — directly or indirectly — can be linked back to ONE account that has some sort of personal vendetta against "all things Steem." I think... because they got busted for extensive plagiarism/spam, a really long time ago.

So it's basically juvenile grade school revenge, automated...