I’ve noticed these accounts too. We have always planned on building out some type of “authenticity” score to try to determine what is a real human and what is automated. From there, we can further sort malicious bots (or unknown intentions) from friendly. Haven’t gotten around to it yet, but it’s on the roadmap.

To be honest, blank accounts without posts or any info won’t be very successful at breaking in to your WoT. With one degree of separation you can always see who your link is and unfollow them.