create bad topics and ask other fans to vote for their fav or not to vote for the deserving contestant.
how many emon fans had voted for puja last week.
how many deepali fans had voted for puja(i know 2-3 people)
but puja fans are not that stupid
puja fans always appreciated talent/singing - so they supported deepali and emon also. so they will vote for emon for sure.
this type of tactics will affect only the normal people those who dont have a particular fav.
you can see that on election also. but that normal consist of 50% people are deciding the winner.