You still don't get it. In our society, where power is centralised and concentrated in a few places/persons/instutitions, it's possible for small numbers of influential people to make significant impacts on what happens - at least in a direct-cause/effect kind of way. In an anarchy, because centralised power like this wouldn't exist you couldn't have a few people acting to influence the whole of society. You might get it happen in a community, or even a region, but to gain power and control over a society that is socialised into rejecting arbitrary, hierarchical authority and is schooled in how things 'used to be' would be night on impossible.
How would such a society deal with them when they are 'revealed'? I don't know - their crime would be attempted, or actual, choice theft (read Perdido Street Station for an explanation) because they were seeking to deny others their free choice by imposing themselves and their agenda on the social body. What the society chose to do with this would be up to them. Personally I'd think limited incarcertation coupled with finding out why/how said person had developed a pathological personality.