Hallo!
I don't know what you mean by "clean it up by hand" but if you just mean users deleting spam edits then this is not sustainable. The spam edits are automated and so they will win any editwar. To combat spam,
+1
we need something systematic: block the spam IPs, use MediaWiki Spam Blacklist, or require users to create an account before they can edit.
Yes, or use at least captchas (if we don't want to force people to make an account) ...
LG Georg