"They" are me.
What's up with this belief that anybody you haven't heard of is a member of some shadowy organization? I'm a well known security researcher, I give several presentations a year at cybersec conferences, and my blog gets regularly link to from news.ycombinator.com.
Also, the post above excludes the first part of that: "We are happy to add your IP addresses to our blacklist so we won't ever scan you again".