First, I agree with the goal of lowering the administrative overhead for write access to the wiki.
qma ster wrote:
My proposal is to give the edit rights to all the subscribers of the coreboot/flashrom mailing lists
..
I strongly believe that all the members of coreboot/flashrom mailing lists are responsible smart individuals
I don't believe that at all. There is no evidence whatsoever to support that all subscribed email addresses actually correspond to individuals. I expect that many list recipients are programs.
Alternatively, the registration could be made completely open, but with a strong registration/login captcha or maybe even per-edit captcha to prevent the automatic bots/spammers from ruining the wiki pages
CAPTCHA is not a good tool. It is easy to acquire human solving capacity if you can offer something desirable in exchange. It only stops very low end bots, and unless the challenge is self-hosted it is likely actually training some other bots.
I think a more workable and sustainable solution is to enable more people to grant write access. Another project uses an IRC bot for this task, so that a group of trusted users on the IRC channel(s) can grant write access immediately. It works really well. However, it requires some programming to implement. Please volunteer to work on creating this solution if you can. I guess that it's about a week of R&D.
//Peter