This reminds me of last year during award organised by Icopress, Ratimov voted and some people started copying and pasting the exact choices of Ratimov. Ratimov called them out for plagiarism 
It was just one person who copied some of my answers in certain categories
Seen, maybe one more person added to one person
By the way, he was banned for this.
Do you mean to say "He wasn't banned for this"? Because I don't expect the user to be banned for that...