This company is such a joke. I have no doubt they know who is going in 3 days/week for a full day each time, but so what? What are they gonna do about it?
If they start formal threats and discipline action against even one person, they have to go after everyone. If they don't, the trial lawyers will pounce. This company, by its very public statements (and actions), has put itself on the radar of every large law firm in this country.
That being said, I'm sure they have a few hundred million set aside for litigation settlements. It's small-ball compared to the $150B Stephenson and Stankey have looted and squandered.