So I just noticed an email that just arrived in my primary email.
It referred, specifically, to "Stack Exchange" of which I am not a member. So I assume it was referring to something on Ask Different or SuperUser. I searched on the title of the email ("Downgrading new 16” MacBook Pro: Catalina to Mojave") and didn't find an exact match.
This is the user (seemingly).
Looking at a few other people's profiles I see no email addresses listed. But I am wondering if Stack Exchange ever forwards email from users, displays a user's email address or did this guy just google me and find my email that way?
It's just a little freaky getting an email asking a Mac question directly from someone I don't know and as it seemed to come as a result of answers I have provided here I was hoping Meta might be the place to ask this.