Marking eggs with a sharpie

[Midnightman14]

I don't hatch eggs, but I imagine that sharpies can't be good for eggs even if they don't affect the hatch rate.
Think of how bad sharpies smell from the chemicals, and the fact that the eggshell is porous.
Clearly, the person who wrote that "There has not been any issues with the sharpy on eggs reported yet!" is not an expert...
Why risk it when there are alternatives?

https://www.backyardchickens.com/t/123506/marking-on-eggs-with-sharpie-bad-thing
https://www.backyardchickens.com/t/836544/marking-eggs-sharpie-vs-pencil

sharpies are non toxic did a lab on this in freshman chemistry. The smell means nothing, vinegar is non toxic too and it sure doesn't smell good either.