Didn't filled a field in our application

Hi Everyone. I've applied with my team for this season at YC, however we didn't filled a field that standout because it is not related to your informatics skills. You know the one that say: "Please tell us about the time you, gumbo, most successfully hacked some (non-computer) system to your advantage." So you're going to ask me why: in fact the only thing that came to my mind at this point is something close to "illegal". And with the team we agreed to not fill this field. Now the deadline has passed and we're worried because this can play agains't us. So now the question is, should we write to YC and say, "hey i confess, and i've hacked some "non-computer" system"? Maybe this could play agains't us even more. Looking for advices. Thanks.