Seems to be a loop hole for profile owners not wanting voters to be able to see previous dispute vote texts on their profile. Not really in line with the fundamental ideas of transparency on Beltchecker.

Would suggest limiting youth profiles to the kids' belts or at least to exclude black belt and above. Or make the comment field visible on youth profiles with claims of blue or higher adult belts.
Fellow beltcheckers can of course also help by disputing ("Are you sure that you want to dispute the validity of the profile information and/or belt history for..."), as I hope most would agree on disputing the validity of the profile information saying an obviously adult person claiming an adult belt is under age of 15.

E.g. https://www.beltchecker.c[...]hp?id=5663 (who also seems to have deleted all wall messages). But I've seen at least one more obviously adult black belt profile with "Youth profile" settings.