New User Flood
"Perhaps I should augment this extension to remove users whose only attempted edits during a 1 week period were blocked in this fashion?"
That policy sounds pretty reasonable, as long as it is clearly written somewhere new users would see.
Make it 3 days and that'll do it for me. We should also nuke users without any posts that registered more then 3 days ago as well (and were not added by an admin), or something.
I think there are some features enabled for registered users. Something with cookies but I cannot recall what are they. So, quiet registered users have a right to exist.
But quite folks do not contribute, so it is probably fine to sweep them away as the bot candidates.
There are not a major amount of benefits to being registered aside from posting. I think it keeps your layout and settings and such. But most active people (even readers) have at least one edit under their belt. Since this is about robocode, you usually make a robot and enter it into the rumble.