Yes, they’re very identifiable. New or resurrected account makes multi-paragraph comments on random topics with “insights” that read like AI, even if they don’t have em-dashes or “it’s not X it’s Y” (and sometimes they do).

Fortunately and in fairness to this site, they’ve become rarer, and most seem to be flagged within hours. Usually I look at the comments to confirm, and most are already dead.