...right now, you kind of have like a Schrödinger-cat equivalent of a None/Zero.

Maybe subtle change to the form validation logic:

Current:

• {Negative Integer} -> Red -> "must be at least 1000"
• {None} -> Yellow -> lets you post
• {0, ..., 999} -> Red -> "must be at least 1000"
• {1000, ...} -> Yellow -> lets you post

Proposed:

• {Negative Integer} -> Red -> "must be 0 or at least 1000"
• {None, 0} -> Yellow -> lets you post
• {1, ..., 999} -> Red -> "must be 0 or at least 1000"
• {1000, ...} -> Yellow -> lets you post