At its most basic, voting implies agreement with the status quo. It is worth quoting the Scottish libertarian socialist James Kelman at length on this:
"State propaganda insists that the reason why at least 40 percent of the voting public don't vote at all is because they have no feelings one way or the other. They say the same thing in the USA, where some 85 percent of the population are apparently 'apolitical' since they don't bother registering a vote. Rejection of the political system is inadmissible as far as the state is concerned. . . Of course the one thing that does happen when you vote is that someone else has endorsed an unfair political system. . . A vote for any party or any individual is always a vote for the political system. You can interpret your vote in whichever way you like but it remains an endorsement of the apparatus. . . If there was any possibility that the apparatus could effect a change in the system then they would dismantle it immediately. In other words the political system is an integral state institution, designed and refined to perpetuate its own existence. Ruling authority fixes the agenda by which the public are allowed 'to enter the political arena' and that's the fix they've settled on" [Some Recent Attacks, p.87]
We are taught from an early age that voting in elections is right and a duty. In US schools, children elect class presidents and other officers. Often mini-general elections are held to "educate" children in "democracy". Periodically, election coverage monopolises the media. We are made to feel guilty about shirking our "civic responsibility" if we don't vote. Countries that have no elections, or only rigged elections, are regarded as failures [Benjamin Ginsberg, The Consequences of Consent: Elections, Citizen Control and Popular Acquiescence, Addison-Wesley, 1982]. As a result, elections have become a quasi-religious ritual.
As Brian Martin points out, however, "elections in practice have served well to maintain dominant power structures such as private property, the military, male domination, and economic inequality. None of these has been seriously threatened through voting. It is from the point of view of radical critics that elections are most limiting." ["Democracy without Elections", Reinventing Anarchy, Again, Howard J. Ehrlich (ed.), p. 124]
Benjamin Ginsberg has noted other ways in which elections serve the interests of state power. Firstly, voting helps to legitimate government; hence suffrage has often been expanded at times when there was little popular demand for it but when mass support of government was crucial, as during a war or revolution. Secondly, since voting is organised and supervised by government, it comes to be seen as the only legitimate form of political participation, thus making it likely that any revolts by oppressed or marginalised groups will be viewed by the general public as illegitimate (see his book The Consequences of Consent).
In addition, Ginsberg argues that, historically, by enlarging the number of people who participate in 'politics,' and by turning this participation into the "safe" activities of campaigning and voting, elections have reduced the risk of more radical direct action. That is, voting disempowers the grassroots by diverting energy from grassroots action. After all, the goal of electoral politics is to elect a representative who will act for us. Therefore, instead taking direct action to solve problems ourselves, action becomes indirect, though the government. This is an insidiously easy trap to fall into, as we have been conditioned in hierarchical society from day one into attitudes of passivity and obedience, which gives most of us a deep-seated tendency to leave important matters to the "experts" and "authorities."
Anarchists also criticise elections for giving citizens the false impression that the government serves, or can serve, the people. As Martin puts it, "the founding of the modern state a few centuries ago was met with great resistance: people would refuse to pay taxes, to be conscripted or to obey laws passed by national governments. The introduction of voting and the expanded suffrage have greatly aided the expansion of state power. Rather than seeing the system as one of ruler and ruled, people see at least the possibility of using state power to serve themselves. As electoral participation has increased, the degree of resistance to taxation, military service, and the immense variety of laws regulating behaviour, has been greatly attenuated." [Op. Cit., p. 126]
Ironically, however, voting has legitimated the growth of state power to such an extent that the state is now beyond any real popular control by the form of participation that made that growth possible. Nevertheless, as Ginsberg observes, the idea that electoral participation means popular control of government is so deeply implanted in people's psyches "that even the most overtly sceptical cannot fully free themselves from it." [The Consequences of Consent, Op. Cit., p. 241]
Therefore, voting has the important political implication of encouraging people to identify with state power and to justify the status quo. In addition, it feeds the illusion that the state is neutral and that electing parties to office means that people have control over their own lives. Moreover, elections have a tendency to make people passive, to look for salvation from above and not from their own self-activity. As such it produces a division between leaders and led, with the voters turned into spectators of activity, not the participants within it.
All this does not mean, obviously, that anarchists prefer dictatorship or an "enlightened" monarchy. Far from it, democratising state power can be an important step towards abolishing it. All anarchists agree with Bakunin when he argued that "the most imperfect republic is a thousand times better that even the most enlightened monarchy." [cited by Guerin, Anarchism, p. 20] But neither does it mean that anarchists will join in with the farce of electioneering, particularly when there are more effective means available for changing things for the better.