The Red Card is awarded against the nominated town not the poster who made the nomination.
TMO's red card is used when the Town has already been used previously, and not withdrawn by the poster before seld appointed TMO arrives on the scene.
TMO's Yellow Card is used to indicate that the town is a legitimate contender which can be used at a later date, but in that instance it has been used out of sequence. Typically because it was submitted too late, or the previous town has been disqualified.
If the quiz has moved on after a Red Card has been awarded, then the challenge to Gaggerlanders is to try to find an alternate town and bit of trivia (gastronomically related or not) to replace the town red carded.