Hi John,
first sorry for the long break on this issue.
There was vacation time in Germany.

To answer your question:
Current spam protection for MoinMoin wikis recommends that we
allow editors screen by a person. Given it some thought I believe this is
fine (at least for the time being). Our list of accounts probably contains
a number of fake accounts which were only created for the purpose of
spamming, thus my suggestion is that we start with a fresh manual list
and transfer those accounts.

Technically we could transfer them all, but I think it will be
suboptimal for our purposes as outlined above.

Regards,
Bernhard