jm y=ÅÐá5éb¨\8[Ôv¿Ëb=(¤ß.LµYou are right, it needs to be figured out. You could still maintain pseudonymity with the right process of generating addresses/distributing the ballots, which would be good enough.
https://whatsonchain.com/tx/b7c532037930fae952a308c3931636a2e1bee0f42814157b6377d92b9a0aca1c