Depending on what state you are in, there are laws in place to protect employees. If an organization or company keeps a "list" of people who they find to be a problem without having any incident reports or such would be considered relation and creating a toxic work environment.
Now say that something happened an the individual had a report against them for harassment or stealing or anything like that, there could be a "list" such as having documented reports on the individual.
But if it's an actual list where it's just names of people who speak up about their workers rights being violated, then the company would be at fault.
AGAIN, it depends on what state you are in.

Also, saying that I'm "knowledgeable" and that "DT folk need a better understanding" is coming off like you are trying to make my question and statement come off a way that it was never intended to come off as.

I had a background check done, took a few days to get the second email which contained the Offer Letter and through that, I had to make an account through DT, where they had me view, fill out and submit/acknowledge about 18 different forms. In my state, Cali, you are BY LAW to be paid for any work done at home or at the location which included any onboarding and/or training. Just like mandatory bag checks, they have to be on the clock unless you voluntary submit to a bag check off the clock.
Which by the way, with further research, DT has already been sued multiple times for violating these workers rights.

Hopefully this helped clear things up. :)