If you want to be an anarchist, your conception of democracy can't just be limited to voting. If I envisioned an anarchist society in the way I'd like to see it, there would be much better processes of decision-making that don't to lead "let's stone someone" coming to a vote.

It's important to understand that oppression and hatred of minority groups is, well, oppressive. If your political system gives you the opportunity to stomp on someone, that almost certainly means that that person's needs/desires/wants were not being taken into account in the decision to stomp on them; hence we have a problem with voting. Here's a bit of theory from The Democracy Project:

One of the reasons it is easy for political scientists to ignore such local associations and assemblies when speaking of the history of democracy is that in most such assemblies, things never come down to a vote. The idea that democracy is simply a matter of voting — which the Founders, too, assumed — also allows one to think of it as an innovation, some sort of conceptual breakthrough: as if it had never occurred to anyone in previous epochs to test support for a proposal by asking people to all put up their hands, scratch something on a potsherd, or have everyone supporting a proposal stand on one side of a public square. But even if people throughout history have always known how to count, there are good reasons why counting has often been avoided as a means of reaching group decisions. Voting is divisive. If a community lacks means to compel its members to obey a collective decision, then probably the stupidest thing one could do is to stage a series of public contests in which one side will, necessarily, be seen to lose; this would not only allow decisions that as many as 49 percent of the community strongly oppose, it would also maximize the possibility of hard feelings among that part of the community one most needs to convince to go along despite their opposition. A process of consensus finding, of mutual accommodation and compromise to reach a collective decision everyone at least does not find strongly objectionable, is far more suited to situations where those who have to carry out a decision lack the sort of centralized bureaucracy, and particularly, the means of systematic coercion, that would be required to force an angry minority to comply with decisions they found stupid, obnoxious, or unfair.

Historically, it is extremely unusual to find both of these together. Throughout most of human history, egalitarian societies were precisely those that did not have some military or police apparatus to force people to do things they did not wish to do (all those sekas and ayllus referred to above); where the means of compulsion did exist, it never occurred to anyone that ordinary people’s opinions were in any way important.

Where do we find voting, then? Sometimes in societies where spectacles of public competition are considered normal — such as ancient Greece (ancient Greeks would make a contest out of anything) — but mainly in situations where everyone taking part in an assembly is armed or, at least, trained in the use of weapons. In the ancient world, voting occurred mainly within armies. Aristotle was well aware of this: the constitution of a Greek state, he observed, largely depends on the chief arm of its military: if it’s a cavalry, one can expect an aristocracy, if it’s heavy infantry, voting rights will be extended to those wealthy men who can afford armor, if it’s light troops, archers, slingers, or a navy (as in Athens), one can expect democracy. Similarly, in Rome, popular assemblies that also relied on majority vote were based directly on military units of one hundred men, called centuries. Underlying the institution was the rather commonsensical idea that if a man was armed, his opinions had to be taken into account. Ancient military units often elected their own officers. It’s also easy to see why majority voting would make sense in a military unit: even if a vote was 60–40, both sides are armed; if it did come down to a fight, one could see immediately who was most likely to win. And this pattern applies, broadly, more or less across the historical record: in the 1600s, for instance, Six Nations councils — which were primarily engaged in peacemaking — operated by consensus, but pirate ships, which were military operations, used majority vote.

All this is important because it shows that the aristocratic fears of the wealthy early Patriots — who when they thought of their nightmare vision “democracy” thought of an armed populace making decisions by majority show of hands — were not entirely unfounded.

Democracy, then, is not necessarily defined by majority voting: it is, rather, the process of collective deliberation on the principle of full and equal participation. Democratic creativity, in turn, is most likely to occur when one has a diverse collection of participants, drawn from very divergent traditions, with an urgent need to improvise some means to regulate their common affairs, free of a preexisting overarching authority.

an anarchist reaction would be largely the same. the difference is that the "dictatorship of the proletariat" would be established only when and as needed and when there was no threat, it would be dismantled at all other times.

The US structures of city -> county -> state -> nation would be a good example of a functional anarchistic structure if not for the supremacy doctrine that reverses the priority of power.

TBH I'm not sure what the right move would be if a neighboring community started being oppressive and reactionary, my instinct is that the neighbors band together and stomp it out. but if it started happening under a participatory democratic system (not just voting on everything but real consensus discussion) I think it may just be that anarchism has failed.