Quite a few wikipedias have by now appointed checkusers. How have people reasoned on the various projects while appointing their checkusers - do they need to be "tech folks" or not? To what extent should a checkuser have some prior knowledge, that can not easily be picked up by a trusted but not very tech-knowledgeble person? I have heard both opinions, both "it is very important" and "it is not very important" but not very much resoning for either side.
/Habj