Long press a username and select edit tag:

Hopefully I captured both the rage and panda lol.

And yeah, I’ll tag people as trolls/agitators, bigots, headline bots (even if there’s a real person behind the account), [insert political label here], etc. I’ll still block if I feel the need to, but a nice yellow and black “warning” tag lets me know to just not engage, and why.

Edit: you may need to go into settings -> user tags and enable them first.

I figure you are asking about Voyager, but for any Thunder users reading this thread: longpress a comment > user > add user label

I use Voyager and had no idea.