I've been thinking about this, and in the Forums here we have always deleted spam and banned spam-bots. Shutting down memberships was just a move to ease the problem of deleting/banning the spam-accounts - Once done, the spam stopped.
But in Wikkis case, no one has ever banned or deleted any accounts, so there could be hundreds if not thousands of spam-bot Wikki members; this will be a problem of its own.
Might be easier/faster to delete all Wikki accounts and start over again, or just use the forum memberships instead (all Wikki posters are here anyways)- We may never see the end of Wikki spammers no matter what. One spam bot could have 50 accounts with one active (next one will pop up when you delete the first)
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