If identity checking in elections is used only to stop some groups, what is the problem?

Correct answer: Selective restriction and unequal participation

An identity-checking rule must apply equally to all voters. If it is used to prevent only particular social, religious, or political groups from voting, their electoral participation becomes unequal. Such discriminatory use means that the election is not free and fair. Verifying genuine voters is a valid purpose, but applying checks selectively is a misuse of that purpose. Exam tip: electoral fairness requires equal rules and equal voting opportunity for every voter.