Birth tourism
Some countries do not allow their citizens to renounce their citizenship or only if the citizenship was acquired by birth there to non-citizen parents. In Argentina, Brazil, Ecuador, Peru, and Uruguay, voting is compulsory for citizens. In Bolivia, Brazil, Chile, Colombia, Cuba, Guatemala, Paraguay, and Venezuela, military service is mandatory.
Voter suppression in the United States
The United States is the only democracy in the world that regularly bans large numbers of felons from voting after they have discharged their sentences. Many countries including Canada, Denmark, France, Germany, Israel, Japan, Kenya, Norway, Peru, Sweden, and Zimbabwe allow prisoners to vote (unless convicted of crimes against the electoral system). Some countries, notably the U.K., disenfranchise people for only as long as they are in prison (however, this has been challenged by the European Court of Human Rights).