When I discovered that someone was a minor, I deleted their requests, removed them from the discord, and contacted the person who had already written for them directly. There was already a rule in place that players have to be 18+ (the participant re-reading the rules saw it and reached out to me) but I do plan to make it more obvious going forward. All mods were aware of who it was and we were keeping an eye open for any additional gifts that came in for them. If we do surveys before assigning teams next year, a question asking participants if they are over 18 will be part of it.