I think GP may be thinking that emojis in PR comments (plus the other red flags they mentioned) are the result of copy/paste from LLM output, which might imply that the person who does mindless copy/pasting is not adding anything and could be replaced by LLM automation.

The point is that heavy emoji use means AI was likely used to produce a changeset, not that emojis are inherently bad.

The emojis are not a problem themselves. They're a warning sign: slop is (probably) present, look deeper.