Ouch my eyes, I don't want to see the UR's you get for that one.
When I find an editor adding roads incorrectly, like you I did a search of the forums, I rarely found a positive match. I made the assumption, that if they registered with Waze, then Waze has their email address on file. I then sent them a PM, with links to the wiki pages for the item, intersections, parking lot roads etc, that were done incorrectly and explaining what was wrong. Sometimes you get a reply, and sometimes you don't. If after a couple days I don't get a reply, I go to the Permalink I saved and fix and lock the road. If it wasn't for some of the tools it would make it harder to find changes made by certain people.
Yes, I agree with your statement. There should be some on-line test after they've watched the Waze video and done a few edits before they can get to update the live map. All users when first registered get view only. You have to work your way up to get more edits privs.
Graduated edit levels and not just by 1 mi radius
Edit Level 0 - None, View only
Edit Level 1 - Road Types you can edit: Drivable Streets & Other Drivable Streets, 1mi
Edit Level 3 - Road Types: Highways, Drivable Streets & Other Streets (Current AM)
and so on.