I don't know... there are people who have valid points, who are just chronically unable to keep from making improper article edits if they have edit permission.
There have been a number of Arbcom "can't edit the article but can edit the talk page" rulings over the years.
A technical enforcement for that might be nice.
A generalized ACL mechanism in Mediawiki, now... *drool*...
(yes, I know. I know PHP. I might have to develop it myself.)
-- -george william herbert george.herbert@gmail.com
The more I see these people, "who make valid points, but are chronically unable to keep from making improper article edits" the more I see that they don't really have any valid points. And after watching a botany entrenched editor with "valid points" who can't restrain herself from "making improper article edits," now using sock puppets, and ranting about crap on her talk page (which no one bothers responding to), after being banned, the less doubtful I am that there are editors who have "valid points" but can't stay away from "improper edits," and I don't trust their "valid points" as far as I can throw them.
KP