Remembering to look for and ignore folks with that telltale indicator has made the fediverse so much more enjoyable.
I knew it was a leftist instance. I went into it (naively) excited to engage with a more thoughtful leftist internet space, considering it was a bunch of reddit exiles who were upset about heavy handed Reddit censorship. I was quite disappointed to learn quickly that it was just more of the same tankie brain rot, with more of the same tankie censorship you can find in a thousand different tedious places.
Even then I stuck with it for a bit. And then I learned that the head admin was potentially the most fragile person on the Internet, who literally will not post outside his own instance because he cannot handle any internet where he does not have (what he believes to be) a "win argument" ban button. It is literally so cringe, I cannot stand to be associated with it, and I don't understand how other people tolerate being associated with his antics.