I'm afraid that, no matter what, a whole lot of the work on reminding people might be up to you as the mod. That said, the level of enforcement and punishment is up to you. This first year, we're certainly on a test run, and possibly we can just have a one sentence thank you requirement with no expectation of a demerit or consequence as our test run to see how it goes simply knowing that's a stated part of the good manners of the ficathon this year?