I have been removing the rewards off these accounts for months. They are all blocked from the UI and as he adds new ones I submit them to be removed as well.
I just went through and removed the few rewards left on these accounts. I tend to sweep them to $0 every few days.
Getting them removed from the UI will be more difficult with Steemit Inc's current situation but I will continue to submit them as they show up.
Thank you. Let's hope that this spam stops when there are no rewards.