I do believe we've talked about doing that in the past. I don't recall, off-hand, what the reason for ethics shooting it down was. I think part of it may have been foreseen difficulty trying to coordinate this with the administrative folks at Anthrocon. Unfortunately, as you mentioned, this doesn't help with the online problem (which is where the vast majority of minors have access to the survey).
I do believe we've talked about doing that in the past. I don't recall, off-hand, what the reason for ethics shooting it down was. I think part of it may have been foreseen difficulty trying to coordinate this with the administrative folks at Anthrocon. Unfortunately, as you mentioned, this doesn't help with the online problem (which is where the vast majority of minors have access to the survey).