I'm confused. CoachChoice exit row seats have the same check-in/rule-acceptance requirements as normal exit row seats... eg: the purchaser has to agree to all the terms, etc.
If someone is buying a CoachChoice exit row seat, and agrees to the conditions while knowing they are not meeting the conditions, this is a pax issue... not a NW FA issue. If someone did this, I'd say move them, and keep their money for their error.
Steve B.