Hi, we already banned this user on the spaminator blacklist a few days ago.
There is no general Hivewatcher blacklist comment anymore as Steemit troll "mmmmkkkk311" aka "crime" has been downvoting these informative comments.
@guiltyparties is working diligently to get a new blacklist commenting feature as well as a user interface where the community can search for blacklisted accounts or download the whole Hivewatchers blacklist.

You can find all currently, actively blacklisted accounts on the spaminator blacklist here:
https://spaminator.me/api/bl/all.txt

The best way to get rid of @nobustd account is to help in downvoting it so the reputation goes into negative.