Earlier quoted context omitted.
My area (PL) is dominated by conferences, and I'm pretty sure the chair doesn't screen out submissions, even ones that are obviously cranky.
Funny you should say that, I just recently registered for a conference where the HTML form could not even be submitted until the "Institution" and "Role at institution" fields were filled in. I don’t know if unknown people who wrote "None" would be filtered out, but it shows the general expectations that the organizers have.
Submission management platforms are pretty generic, no one (in their right mind) rolls their own, so I wouldn't take the way they work as signals of intent.