Using multi-accounts to vote for pictures
We know that there is an ingress agent that has multiple accounts and share others with different agents and he uses all this accounts to vote in portal pictures.
This way he is the only one in the entire city that chooses all the portal pictures he wants as well as the POIs being upgraded to gyms in Pokémon Go.
Recently we had a graffiti that was changed by another one and we submitted the new photo as well as a description change but when he realized it he mass voted on the old picture, one that does no longer exists.
Is there anything we can do? Surely he may have 20+ accounts but don't believe he has that many phones, so the majority of the votes were realized in the same equipment. Can't niantic check this?