He said people at the meetings were warned that whoever voted for the opposition would face severe retribution.
"They will launch another operation, called Operation Elimination, where people will be disappearing," he said. "They repeat the same message over and over."
People were given the option of approaching the presiding officer at the polling station, pretending to be illiterate and telling the official to record a vote for Mugabe, he said.
Tobaiwa voted for Tsvangirai in the first round of the presidential election but plans to stay away Friday.
"I voted for the MDC because of the difficulties that we are facing. We had hoped that there was room for change. But I'm afraid that if I vote for the party of my choice, they will kill me."
Ruling party officials have said it is the patriotic duty of Zimbabweans to vote but have not issued specific threats against those who don't.
Ndaziweye was stunned by the hundreds of apparently enthusiastic ZANU-PF supporters at the meeting Sunday. With most people terrified to talk politics -- in contrast to the situation before the first round vote in which Tsvangirai received more votes than Mugabe but not, according to the Electoral Commission, an outright majority -- she believes they just want to "be good" and avoid angering the ruling party operatives.
"They want to show they're strong ZANU-PF, or [the ZANU-PF militants] will say you are just coming there to fool them and you are really MDC, not ZANU-PF warriors, as they say it," she said.
ZANU-PF youth militias have beaten people at their nearby base, she said.
She believes most youths are there because they are provided cornmeal porridge, called sadza.
"They were singing [on Sunday] because they had enough food for today. They don't know about tomorrow. After the vote, they will be thrown away, they will just go starving because [ZANU-PF] can't keep looking after them."
Despite Tsvangirai's withdrawal from the race because of the violence, Ndaziweye thought it was still important for people to vote.
"People must be brave, even though Mugabe has said he is not going to give up. It's better that we show Tsvangirai has won, even if we know he's not going to be president until after Mugabe dies."
