Ballot harvesting is when a political group "collects" people's ballots to turn in "on their behalf." It is illegal in the vast majority of states for obvious reasons.
Ballot harvesters may go door do door, saying, for example, If you want to vote democrat I can help. Or they can only collect from black neighborhoods. Or they may go to nursing homes and fill in the ballots for the people. Or throw away the GOP votes etc.
Frankly, making it easier to vote helps Democrats, as stupid, lazy and unmotivated people usually vote left.
I remember years ago my wife asked on of her friends who she was going to vote for. She said something to the effect of "I don't know. Who is going to give the most free money to poor people?"
These are exactly the kind of people the left wants to vote.
I am a big fan of limited franchise (such as, possibly, only to net tax payers).
Universal franchise has been a disaster, as our 30 trillion dollar debt demonstrates.