Any problems ! -- YES
Tallier may cheat !! - may cast votes for people who think it’s a waste of time voting for such pity elections.
Interestingly, voters may discover this violation, report it but they cannot prove that they did not actually vote.
Tallier and validator can collude - voters’ privacy at stake.
The voters can still prove that they voted in a particular way.
Solution to most of these problems given by :
Fujioka, Okamoto, Ohta in 1993 ---> Now forms a basis for most advanced research in this field.