[antisthenes]

Look for usernames that look like 2 words from a dictionary, then hyphen, then 4 digits.

Almost always, it's a ragebait post that looks like it could be written by a specialized AI. Or some low-brow high-upvote take.

[CryptoBanker]

That’s what Reddit autogenerated usernames look like

[pixl97]

That is correct.

Now, what would be more interesting to know, but Reddit isn't going to tell us is "How many accounts banned for bot behavior use a custom username versus using the default generated username".