>>Have something like an Editor Aide application and have the applicant report his findings of abuse, spamming, etc. to a specific editor who can keep a tally of his performance and ability to edit, then if he is qualified based on his record allow him to become an editor. This way the applicant has a chance to show is knowledge of editing, keeps him from wondering why he was rejected and also helps DMOZ from accepting someone based on an application which doesn't really show what a person is capable of.
This is not at all a bad idea.
Now, how do we (the editors) implement it? Um, we can't really, it requires programming the back end. And of course you can't do it.
Or can you?
This is a volunteer organization. The invariable rule applies: act as if you have the position you want, and if people notice that it is valuable, they'll make the position for you. Anyone can do that -- you, an editor, an editall, a meta-editor.
I assume you have a category in mind. Go check out the editors there. Pick an editor that with a combination of "high" activity (as measured by editing large categories) and "high" interest (as measured by being named as editor on a nearby category. Contact them, with two or three examples of your analysis ("xxx is the same as yyy, compare page zzz". Tell them you'd like to edit in that category, maybe submit a few sites with good examples (all from the same e-mail address, of course.) No guarantee, but I suspect you'll get a response from one of the first several editors you approach like this. If you don't, contact a meta-editor that concentrates on that branch of the tree (that is, who is listed at top-level Shopping if it's a Shopping category.)
After, say, a dozen or so of your changes are accepted, tell them you'd like to be an editor, that you're going to submit an application, and that you'd like them to recommend you. Mention in the application that you've been working with that editor.
Now, nothing is certain -- the metas have to be a bit more skeptical about accepting applications than editors are about accepting suggestions: but even if you don't get accepted, you did get a dozen or so good changes in, and you did find a conduit for getting good changes in quickly. And with a reputation and a sponsor, you have a leg up on your next application.