First, some pages (e.g. Israel) will probably just have to permanently be
protected. Well, maybe you need some sort of intermediate level of protection; e.g. only editable by someone who a) has an account, b) has it for a month, and c) has made a threshold level of accepted edits. But allowing anyone, even someone who's not logged in, to edit them is just going to turn into a constant edit war.
This is actually a pretty good idea. I'm always in favor of finding ways to turn our blunt instruments into 'softer' tools. What I like about your proposal here is that it *is* soft. It could be used only for certain pages marked as 'controversial', and that only *after* they've become targetted for some kind of mass attack, or if an ongoing flame war has lasted for months with no hope of resolution.
I think it is a *very* bad idea. It will add another level to the Wikipedia hiearchy. I'd rather have the sporadic vandals and flame wars than let that happen. In my utopia every anon should be treated exactly the same as Jimbo Wales. Let's just accept the fact that there will always be vandals. They haven't fucked up WP yet so why worry? It's like those patriot laws... :-)
BL