Voting by secret ballot means that when voting, voters don't sign the ballot paper, and voting by show of hands is a common voting method. Usually, in a show of hands, the sum of the pros and cons does not represent all voters.

The voting results can be manipulated by the organizers. If they agree, they can ask the naysayers to raise their hands. If they object, they can also call on those who agree to raise their hands. In such a group composed of "minority supporters plus majority followers plus minority opponents".