@Jeffro -Molom should have worked for new comments, but it may not have been doing the spam check on edited comments. I know for certain that my own plugin does not work with it for example. That is unlikely to make any difference whatsoever though as it's unlikely the spam bot will be smart enough to edit it's own comment. Perhaps if the plugin becomes crazy popular it could become an issue, since bots might be developed to work around it, but at this stage we should be safe. And if worse comes to worse, we can just hook in some spam protection directly to the simple comment editing plugin.